Restructure build system and directory structuresHEADmaster

48 files changed, 2575 insertions, 508 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..36698df
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+site/**/*.html
+site/img-small/*
+site/svg/*
+build/*
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c2399c7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,15 @@
+all :
+	find site -name "*.html" -printf "https://thomaslabs.org/%P\n" > site/sitemap
+
+.PHONY : svg
+svg :
+	latex -output-directory build -interaction nonstopmode src/svg/fft.tex
+	dvisvgm build/fft.dvi --no-fonts --exact-bbox --output=site/svg/fft.svg
+
+.PHONY : clean
+clean :
+	rm -rf site/svg/* site/img-small site/math site/programs site/z80 site/index.html site/privacy.html site/arm site/sitemap
+
+.PHONY : upload
+upload :
+	rsync -Pa --delete "site/" "thomas@gamma:/srv/web/thomaslabs/"
diff --git a/math/index.org b/math/index.org
deleted file mode 100644
index 069c4b6..0000000
--- a/math/index.org
+++ /dev/null
@@ -1,13 +0,0 @@
-#+TITLE: Math and Physics articles
-#+SETUPFILE: ../math_options.org
-
-- [[file:vectors.org][Cross Product]]
-- [[file:cylindrical_coordinates.org][Cylindrical Coordinates]]
-- [[file:matrices.org][Matrix Properties]]
-- [[file:orbit.org][Orbit]]
-- [[file:polar_coordinates.org][Polar Coordinates]]
-- [[file:spherical_coordinates.org][Spherical Coordinates]]
-- [[file:derivatives.org][Table of Derivatives]]
-- [[file:integrals.org][Table of Integrals]]
-- [[file:levi_cevita.org][The Levi Cevita Symbol]]
-- [[file:trigonometry.org][Trigonometric identities]]
\ No newline at end of file
diff --git a/math/integrals.org b/math/integrals.org
deleted file mode 100644
index 6a32903..0000000
--- a/math/integrals.org
+++ /dev/null
@@ -1,20 +0,0 @@
-#+TITLE:Table of Integrals
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \newcommand{\intg}[2]{\int #1 \text{d}x &= #2 + C}
-
-* Disclaimer
-This site as of now just a technology demonstration and its claims
-should not be taken as true (even though I myself am pretty confident
-they are)
-
-* Trigonometric Funtions
-\begin{align*}
-\intg{\sin(x)}{-\cos(x)}\\
-\intg{\cos(x)}{\sin(x)}\\
-\intg{\tan(x)}{-\ln(\cos(x))}\\
-\intg{\sec(x)}{\ln(\sec(x) + \tan(x))}\\
-\intg{\csc(x)}{-\ln(\csc(x) + \cot(x))}\\
-\intg{\cot(x)}{\ln(\sin(x))}
-\end{align*}
diff --git a/math/math.css b/math/math.css
deleted file mode 100644
index d4e1054..0000000
--- a/math/math.css
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
-p.author
-p.date
-p.creator
-.title
-.subtitle
-.todo
-.done
-.WAITING
-.timestamp
-.timestamp-kwd
-.timestamp-wrapper
-.tag
-._HOME
-.target
-.linenr
-.code-highlighted
-div.outline-N
-div.outline-text-N
-.section-number-N
-.figure-number
-.table-number
-.listing-number
-div.figure
-pre.src
-pre.example
-p.verse
-div.footnotes
-p.footnote
-.footref
-.footnum
-.org-svg
-*/
-
-html {
-    height: 100%;
-    color: #cccccc;
-    background-color: hsl(240, 30%, 10%);
-}
-
-body {
-    margin: auto;
-    max-width: 64em;
-    min-height: 100%;
-    display: flex;
-    flex-direction: column;
-    background-color: hsl(240, 30%, 15%);
-}
-
-main {
-    padding: 2em 2em 2em 2em;
-    flex-grow: 1;
-}
-
-h1 {
-    text-align: center;
-}
-
-#content {
-    max-width: 50em;
-    margin: auto;
-}
-
-div.outline-2:first-of-type {
-    padding: 0.25em 1em;
-    background-color: hsl(60,30%,30%);
-}
-
-.equation-container {
-    display: block;
-    padding: 1em 2em;
-    background-color: hsl(240, 30%, 20%);
-    overflow: auto;
-    border: 1px solid hsl(240, 30%, 50%)
-}
-
-img {
-    max-width: unset;
-}
-
-.equation-container img {
-    object-fit: contain;
-    display: block;
-    margin: auto;
-}
diff --git a/math_options.org b/math_options.org
index 5fd9baa..75cde25 100644
--- a/math_options.org
+++ b/math_options.org
@@ -1,5 +1,34 @@
-#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="/style.css" />
-#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="/math.css" />
-#+HTML_HEAD_EXTRA: <meta name="author" content="Thomas Albers Raviola">
-#+HTML_HEAD_EXTRA: <meta name="description" content="Hobbyist electronics, programming and more">
-#+MACRO: date_place $1, $2, {{{date(%B %d\, %Y)}}}
+#+html_head: <link rel="stylesheet" type="text/css" href="/css/style.css" />
+#+html_head: <link rel="stylesheet" type="text/css" href="/css/math.css" />
+#+html_head_extra: <meta name="author" content="Thomas Albers Raviola">
+#+html_head_extra: <meta name="description" content="Hobbyist electronics, programming and more">
+
+#+macro: date_place $1, $2, {{{date(%B %d\, %Y)}}}
+
+#+macro: beg-eqn \begin{equation*}
+#+macro: end-eqn \end{equation*}
+
+#+macro: beg-align \begin{align*}
+#+macro: end-align \end{align*}
+
+#+macro: ref
+
+#+latex_header: \usepackage{bm}
+#+latex_header: \usepackage{amssymb}
+
+#+latex_header: \newcommand{\deriv}[2]{\frac{\text{d}#1}{\text{d}#2}}
+#+latex_header: \newcommand{\pderiv}[2]{\frac{\partial{}#1}{\partial{}#2}}
+#+latex_header: \newcommand{\unitv}[1]{\bm{\hat{e}}_#1}
+#+latex_header: \newcommand{\dcoff}[1]{\frac{\text{d}}{\text{d}x} #1}
+#+latex_header: \newcommand{\sdcoff}[1]{\frac{\text{d}#1}{\text{d}x}}
+
+#+latex_header: \newcommand{\ddx}[2]{\frac{\text{d}}{\text{d}x} #1}
+#+latex_header: \newcommand{\intg}[2]{\int #1 \text{d}x &= #2 + C}
+#+latex_header: \newcommand{\D}[1]{\text{d}#1}
+
+#+latex_header: \DeclareMathOperator\arsinh{arsinh}
+#+latex_header: \DeclareMathOperator\arcosh{arcosh}
+#+latex_header: \DeclareMathOperator\artanh{artanh}
+#+latex_header: \DeclareMathOperator\arcoth{arcoth}
+#+latex_header: \DeclareMathOperator\arsech{arsech}
+#+latex_header: \DeclareMathOperator\arcsch{arcsch}
diff --git a/options.org b/options.org
index 234c394..3434526 100644
--- a/options.org
+++ b/options.org
@@ -1,4 +1,4 @@
-#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="/style.css" />
+#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="/css/style.css" />
 #+HTML_HEAD_EXTRA: <meta name="author" content="Thomas Albers Raviola">
 #+HTML_HEAD_EXTRA: <meta name="description" content="Hobbyist electronics, programming and more">
 #+MACRO: date_place $1, $2, {{{date(%B %d\, %Y)}}}
diff --git a/publish.el b/publish.el
index a327d02..6786c7d 100755
--- a/publish.el
+++ b/publish.el
@@ -15,6 +15,8 @@
              "programs"))
       (li (a (@ (href "/math/"))
              "math"))
+      (li (a (@ (href "https://git.thomaslabs.org"))
+             "git"))
       (li (a (@ (href "/privacy.html"))
              "contact &amp; privacy policy"))))))
 
@@ -22,7 +24,7 @@
   (sxml-to-xml
    `(footer
      (p
-      "Copyright © 2021 - 2022 Thomas Albers Raviola"
+      "Copyright © 2021 - 2023 Thomas Albers Raviola"
       (br)
       "This website and its contents are published under the
 following licences, unless otherwise specified"
@@ -51,9 +53,14 @@ following licences, unless otherwise specified"
             ,(org-html--build-head info))
            (body
             ,(if-let ((title (plist-get info :title)))
-                 `(header
-                   (p "Thomas' Labs")
-                   (h1 ,(org-export-data title info)))
+                 (let ((subtitle (plist-get info :subtitle)))
+                   `(header
+                     (div "Thomas' Labs")
+                     (h1 ,(org-export-data title info))
+                     ,@(if subtitle
+                           `((div (@ (class "subtitle"))
+                                   ,(car subtitle)))
+                         '())))
                `(header
                  (h1 "Thomas' Labs")))
             ,(thomaslabs-navbar)
@@ -72,7 +79,8 @@ should not be taken as true (even though I myself am pretty confident
 they are"))))
 
 (defun math-sitemap (title entries)
-  (concat (format "#+TITLE: %s\n#+SETUPFILE: ../math_options.org\n\n" title)
+  (concat "#+title: " title "\n"
+          "#+setupfile: ../../math_options.org\n\n"
           (org-list-to-org entries)))
 
 
@@ -82,7 +90,6 @@ they are"))))
           description))
 
 (defun org-img-link-export (link description format info)
-  (message "%s" info)
   (format "<a href=\"%s\">%s</a>"
           link
           description))
@@ -98,6 +105,18 @@ they are"))))
                          :follow #'org-local-link-follow
                          :export #'org-img-link-export)
 
+(defvar root-dir (expand-file-name ""))
+
+(defun org-export-file-uri (filename)
+  "Return file URI associated to FILENAME."
+  (cond ((not (file-name-absolute-p filename))
+         (string-remove-prefix "site" filename))
+        ((string-suffix-p ".jpg" filename)
+         (concat "/img-small" (string-remove-prefix "/img" filename)))
+	    (t
+         (string-remove-prefix (concat root-dir "/site")
+                               (expand-file-name filename)))))
+
 (org-export-define-derived-backend 'thomaslabs-html 'html
   :translate-alist
   '((template . thomaslabs-template)))
@@ -110,96 +129,112 @@ they are"))))
                       plist
                       pub-dir))
 
-(setq org-publish-project-alist
-      `(("thomaslabs_html"
-         :base-directory "~/Code/websites/thomaslabs/src"
-         :publishing-directory "/srv/web/thomaslabs"
-         :publishing-function thomaslabs-publish-to-html
-         :with-toc nil
-         :recursive t
+(defun image-dimensions (pathname)
+  (with-temp-buffer
+    (call-process "identify" nil (current-buffer) nil
+                  "-ping" "-format" "%wx%h" pathname)
+    (mapcar #'cl-parse-integer (split-string (buffer-string) "x"))))
+
+(defun resize-image (factor input output)
+  (let ((percentage (format "%.01f%%" (* 100.0 factor))))
+    (call-process "convert" nil nil nil input "-resize" percentage output)))
+
+(defun thomaslabs-publish-image (_plist filename pub-dir)
+  (unless (file-directory-p pub-dir)
+    (make-directory pub-dir t))
+  (let ((output (expand-file-name (file-name-nondirectory filename) pub-dir)))
+    (unless (file-equal-p (expand-file-name (file-name-directory filename))
+			  (file-name-as-directory (expand-file-name pub-dir)))
+      (let* ((dimensions (image-dimensions filename))
+             (width (cl-first dimensions))
+             (height (cl-second dimensions))
+             (factor (min (/ 800.0 width) (/ 800.0 height) 1.0)))
+        (resize-image factor filename output)))
+    ;; Return file name.
+    output))
+
+(defun org-html--wrap-latex-environment (contents _ &optional caption label)
+  "Wrap CONTENTS string within appropriate environment for equations.
+When optional arguments CAPTION and LABEL are given, use them for
+caption and \"id\" attribute."
+  (format "\n<div%s class=\"equation-container\">\n%s%s\n</div>"
+          ;; ID.
+          (if (org-string-nw-p label) (format " id=\"%s\"" label) "")
+          ;; Contents.
+          (format "<span class=\"equation\">\n%s\n</span>" contents)
+          ;; Caption.
+          (if (not (org-string-nw-p caption)) ""
+            (format "\n<span class=\"equation-label\">(%s)</span>"
+                    caption))))
+
+(defvar default-html-project-properties
+  '(:publishing-function thomaslabs-publish-to-html
+                         :with-toc nil
+                         :recursive nil
+
+                         :language "en_US"
+                         :html-head-include-default-style nil
+                         :html-head-include-scripts nil
+                         :html-preamble nil
+                         :html-postamble nil
+                         :html-use-infojs nil
+                         :html-html5-fancy t
+                         :html-doctype "html5"
+                         :with-toc nil
+                         :section-numbers nil
+                         :with-latex dvisvgm))
 
-         :language "en_US"
-
-         :html-head-include-default-style nil
-         :html-head-include-scripts nil
-         :html-preamble nil
-         :html-postamble nil
-         :html-use-infojs nil
-         :html-html5-fancy t
-         :html-doctype "html5"
-         :with-toc nil
-         :section-numbers nil
-         :with-latex dvisvgm)
-
-        ("math_html"
-         :base-directory "~/Code/websites/thomaslabs/math"
-         :publishing-directory "/srv/web/thomaslabs/math"
+(setq org-publish-project-alist
+      `(("root"
+         :base-directory "src"
+         :publishing-directory "site"
+         ,@default-html-project-properties)
+        ("arm"
+         :base-directory "src/arm"
+         :publishing-directory "site/arm"
+         ,@default-html-project-properties
+         :recursive t)
+        ("programs"
+         :base-directory "src/programs"
+         :publishing-directory "site/programs"
+         ,@default-html-project-properties
+         :recursive t)
+        ("z80"
+         :base-directory "src/z80"
+         :publishing-directory "site/z80"
+         ,@default-html-project-properties
+         :recursive t)
+
+        ("math"
+         :base-directory "src/math"
+         :publishing-directory "site/math"
          :publishing-function thomaslabs-publish-to-html
-         :with-toc nil
-         :recursive t
+         ,@(org-plist-delete default-html-project-properties :html-preamble)
 
-         :language "en_US"
-
-         :html-head-include-default-style nil
-         :html-head-include-scripts nil
          :html-preamble math-preamble
-         :html-postamble nil
-         :html-use-infojs nil
-         :html-html5-fancy t
-         :html-doctype "html5"
-         :with-toc nil
 
          :auto-sitemap t
          :sitemap-filename "index.org"
          :sitemap-title "Math and Physics articles"
-         :sitemap-function math-sitemap
-
-         :section-numbers nil
-         :with-latex dvisvgm)
-
-        ("math_svg"
-         :base-directory "~/Code/websites/thomaslabs/math/ltximg"
-         :base-extension "svg"
-         :publishing-directory "/srv/web/thomaslabs/math/ltximg"
-         :publishing-function org-publish-attachment)
-
-        ("math_css"
-         :base-directory "~/Code/websites/thomaslabs/math"
-         :base-extension "css"
-         :publishing-directory "/srv/web/thomaslabs"
-         :publishing-function org-publish-attachment)
-
-        ("thomaslabs_css"
-         :base-directory "~/Code/websites/thomaslabs/src"
-         :base-extension "css"
-         :publishing-directory "/srv/web/thomaslabs"
-         :publishing-function org-publish-attachment)
-
-        ("thomaslabs_media"
-         :base-directory "~/Code/websites/thomaslabs/media"
-         :base-extension "jpg\\|gif\\|png"
-         :publishing-directory "/srv/web/thomaslabs/media"
-         :publishing-function org-publish-attachment)
+         :sitemap-function math-sitemap)
 
-        ("thomaslabs"
-         :components ("thomaslabs_html"
-                      "thomaslabs_media"
-                      "thomaslabs_css"))
+        ("img"
+         :base-directory "site/img"
+         :publishing-directory "site/img-small"
+         :base-extension "png\\|jpg\\|gif"
+         :recursive t
+         :publishing-function thomaslabs-publish-image)
 
-        ("thomaslabs_math"
-         :components ("math_html"
-                      "math_css"
-                      "math_svg"))))
 
-(plist-put org-format-latex-options :html-foreground "#cccccc")
+        ("thomaslabs"
+         :components ("root" "arm" "programs" "z80" "math" "img"))))
 
-(org-publish "thomaslabs" t)
-(org-publish "thomaslabs_math" t)
+;; (plist-put org-format-latex-options :html-foreground "#cccccc")
+(plist-put org-format-latex-options :html-foreground "#000000")
 
-;; (let ((opt "--delete -Prlpte 'ssh -p 1764'")
-;;       (src "'/srv/web/thomaslabs/'")
-;;       (dst "'root@thomaslabs.org:/var/www/math/'"))
-;;   (call-process-shell-command (format "rsync %s %s %s" opt src dst)))
+(setq org-publish-timestamp-directory (concat (getenv "XDG_CACHE_HOME") "/org-timestamps/"))
+(setq org-preview-latex-image-directory (expand-file-name "site/svg"))
+(setq org-html-htmlize-output-type 'css)
 
-;; (org-publish "thomaslabs" t)
-;; (org-publish "math_svg" t)
+(org-publish "thomaslabs" t)
+;; fork ox-html?
diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..6c745b4
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+lighttpd -f server/lighttpd.conf -D
diff --git a/server/lighttpd.conf b/server/lighttpd.conf
new file mode 100644
index 0000000..181f2c6
--- /dev/null
+++ b/server/lighttpd.conf
@@ -0,0 +1,62 @@
+var.log_root    = env.HOME + "/.local/share/lighttpd"
+var.server_root = env.PWD + "/site"
+var.state_dir   = "/tmp"
+var.home_dir    = "/tmp"
+var.conf_dir    = env.PWD + "/server"
+
+var.cache_dir   = env.HOME + "/.cache/lighttpd"
+var.socket_dir  = home_dir + "/sockets"
+
+server.modules = (
+  "mod_access",
+  "mod_fastcgi",
+  "mod_scgi",
+  "mod_accesslog"
+)
+
+fastcgi.debug = 1
+fastcgi.server = (
+  ".cgi" => ((
+    "host" => "127.0.0.1",
+    "port" => "9000",
+    "check-local" => "disable"
+  )))
+
+server.bind = "0.0.0.0"
+server.port = 8080
+server.document-root = server_root
+server.pid-file = state_dir + "/lighttpd.pid"
+
+server.errorlog = log_root + "/error.log"
+accesslog.filename = log_root + "/access.log"
+
+server.max-fds = 1024
+
+index-file.names += (
+  "index.html"
+)
+
+url.access-deny             = ( "~", ".inc" )
+
+static-file.exclude-extensions = ( ".cgi", ".fcgi", ".scgi" )
+
+include conf_dir + "/mime.conf"
+
+dir-listing.exclude       = ( "~$" )
+dir-listing.encoding = "UTF-8"
+
+## This time we launch the rails application via scgi_rails externally.
+##
+#$HTTP["host"] == "rails2.example.com" {
+#  server.document-root  = server_root + "/rails/someapp/public"
+#  server.error-handler-404 = "/dispatch.scgi"
+#  scgi.server = ( ".scgi" =>
+#    ( "scgi-tcp" =>
+#      (
+#        "host" => "127.0.0.1",
+#        "port" => 9998,
+#        "check-local" => "disable",
+#      )
+#    )
+#  )
+#}
diff --git a/server/mime.conf b/server/mime.conf
new file mode 100644
index 0000000..6daffd6
--- /dev/null
+++ b/server/mime.conf
@@ -0,0 +1,1369 @@
+# created by create-mime.conf.pl
+
+#######################################################################
+##
+##  MimeType handling
+## -------------------
+##
+## https://redmine.lighttpd.net/projects/lighttpd/wiki/Mimetype_assignDetails
+
+##
+## mimetype.xattr-name
+## Set the extended file attribute name used to obtain mime type
+## (must also set mimetype.use-xattr = "enable")
+##
+## Default value is "Content-Type"
+##
+## freedesktop.org Shared MIME-info Database specification suggests
+## user-defined value ("user.mime_type") as name for extended file attribute
+#mimetype.xattr-name = "user.mime_type"
+
+##
+## Use extended attribute named in mimetype.xattr-name (default "Content-Type")
+## to obtain mime type if possible
+##
+## Disabled by default
+##
+#mimetype.use-xattr = "enable"
+
+##
+## mimetype ("Content-Type" HTTP header) mapping for static file handling
+##
+## The first matching suffix is used. If no mapping is found
+## 'application/octet-stream' is used, and caching (etag/last-modified handling)
+## is disabled to prevent clients from caching "unknown" mime types.
+##
+## Therefore the last mapping is:
+##   "" => "application/octet-stream"
+## This matches all extensions and acts as default mime type, and enables
+## caching for those.
+mimetype.assign = (
+	".sarif.json" => "application/sarif+json",
+	".sarif-external-properties.json" => "application/sarif-external-properties+json",
+	".1905.1" => "application/vnd.ieee.1905",
+	".tar.bz2" => "application/x-gtar-compressed",
+	".tar.gz" => "application/x-gtar-compressed",
+	".a2l" => "application/A2L",
+	".aml" => "application/AML",
+	".atf" => "application/ATF",
+	".atfx" => "application/ATFX",
+	".atxml" => "application/ATXML",
+	".cdfx" => "application/CDFX+XML",
+	".cea" => "application/CEA",
+	".dcd" => "application/DCD",
+	".dii" => "application/DII",
+	".dit" => "application/DIT",
+	".lxf" => "application/LXF",
+	".mf4" => "application/MF4",
+	".oda" => "application/ODA",
+	".odx" => "application/ODX",
+	".pdx" => "application/PDX",
+	".ez" => "application/andrew-inset",
+	".atom" => "application/atom+xml",
+	".atomcat" => "application/atomcat+xml",
+	".atomdeleted" => "application/atomdeleted+xml",
+	".atomsvc" => "application/atomsvc+xml",
+	".dwd" => "application/atsc-dwd+xml",
+	".held" => "application/atsc-held+xml",
+	".rsat" => "application/atsc-rsat+xml",
+	".apxml" => "application/auth-policy+xml",
+	".xdd" => "application/bacnet-xdd+zip",
+	".xcs" => "application/calendar+xml",
+	".cbor" => "application/cbor",
+	".c3ex" => "application/cccex",
+	".ccmp" => "application/ccmp+xml",
+	".ccxml" => "application/ccxml+xml",
+	".cdmia" => "application/cdmi-capability",
+	".cdmic" => "application/cdmi-container",
+	".cdmid" => "application/cdmi-domain",
+	".cdmio" => "application/cdmi-object",
+	".cdmiq" => "application/cdmi-queue",
+	".cellml" => "application/cellml+xml",
+	".cml" => "application/cellml+xml",
+	".1clr" => "application/clr",
+	".cmsc" => "application/cms",
+	".cpl" => "application/cpl+xml",
+	".csrattrs" => "application/csrattrs",
+	".mpd" => "application/dash+xml",
+	".mpdd" => "application/dashdelta",
+	".davmount" => "application/davmount+xml",
+	".dcm" => "application/dicom",
+	".xmls" => "application/dskpp+xml",
+	".dssc" => "application/dssc+der",
+	".xdssc" => "application/dssc+xml",
+	".dvc" => "application/dvcs",
+	".es" => "application/ecmascript",
+	".efi" => "application/efi",
+	".emma" => "application/emma+xml",
+	".emotionml" => "application/emotionml+xml",
+	".epub" => "application/epub+zip",
+	".exi" => "application/exi",
+	".finf" => "application/fastinfoset",
+	".fdt" => "application/fdt+xml",
+	".pfr" => "application/font-tdpfr",
+	".geojson" => "application/geo+json",
+	".gpkg" => "application/geopackage+sqlite3",
+	".glbin" => "application/gltf-buffer",
+	".glbuf" => "application/gltf-buffer",
+	".gml" => "application/gml+xml",
+	".gz" => "application/gzip",
+	".tgz" => "application/gzip",
+	".stk" => "application/hyperstudio",
+	".ink" => "application/inkml+xml",
+	".inkml" => "application/inkml+xml",
+	".ipfix" => "application/ipfix",
+	".its" => "application/its+xml",
+	".jrd" => "application/jrd+json",
+	".json" => "application/json",
+	".json-patch" => "application/json-patch+json",
+	".jsonld" => "application/ld+json",
+	".lgr" => "application/lgr+xml",
+	".wlnk" => "application/link-format",
+	".lostxml" => "application/lost+xml",
+	".lostsyncxml" => "application/lostsync+xml",
+	".lpf" => "application/lpf+zip",
+	".hqx" => "application/mac-binhex40",
+	".cpt" => "application/mac-compactpro",
+	".mads" => "application/mads+xml",
+	".mrc" => "application/marc",
+	".mrcx" => "application/marcxml+xml",
+	".ma" => "application/mathematica",
+	".mb" => "application/mathematica",
+	".nb" => "application/mathematica",
+	".mml" => "application/mathml+xml",
+	".mbox" => "application/mbox",
+	".metalink" => "application/metalink+xml",
+	".meta4" => "application/metalink4+xml",
+	".mets" => "application/mets+xml",
+	".h5" => "application/mipc",
+	".maei" => "application/mmt-aei+xml",
+	".musd" => "application/mmt-usd+xml",
+	".mods" => "application/mods+xml",
+	".m21" => "application/mp21",
+	".mp21" => "application/mp21",
+	".doc" => "application/msword",
+	".mxf" => "application/mxf",
+	".nq" => "application/n-quads",
+	".nt" => "application/n-triples",
+	".orq" => "application/ocsp-request",
+	".ors" => "application/ocsp-response",
+	".bin" => "application/octet-stream",
+	".class" => "application/octet-stream",
+	".dll" => "application/octet-stream",
+	".exe" => "application/octet-stream",
+	".img" => "application/octet-stream",
+	".iso" => "application/octet-stream",
+	".lha" => "application/octet-stream",
+	".lzh" => "application/octet-stream",
+	".so" => "application/octet-stream",
+	".opf" => "application/oebps-package+xml",
+	".ogx" => "application/ogg",
+	".owx" => "application/owl+xml",
+	".oxps" => "application/oxps",
+	".relo" => "application/p2p-overlay+xml",
+	".pdf" => "application/pdf",
+	".pem" => "application/pem-certificate-chain",
+	".pgp" => "application/pgp-encrypted",
+	".sig" => "application/pgp-signature",
+	".p10" => "application/pkcs10",
+	".p12" => "application/pkcs12",
+	".pfx" => "application/pkcs12",
+	".p7c" => "application/pkcs7-mime",
+	".p7m" => "application/pkcs7-mime",
+	".p7s" => "application/pkcs7-signature",
+	".p8" => "application/pkcs8",
+	".p8e" => "application/pkcs8-encrypted",
+	".cer" => "application/pkix-cert",
+	".crl" => "application/pkix-crl",
+	".pkipath" => "application/pkix-pkipath",
+	".pki" => "application/pkixcmp",
+	".pls" => "application/pls+xml",
+	".ai" => "application/postscript",
+	".eps" => "application/postscript",
+	".ps" => "application/postscript",
+	".provx" => "application/provenance+xml",
+	".cw" => "application/prs.cww",
+	".cww" => "application/prs.cww",
+	".hpub" => "application/prs.hpub+zip",
+	".rct" => "application/prs.nprend",
+	".rnd" => "application/prs.nprend",
+	".rdf-crypt" => "application/prs.rdf-xml-crypt",
+	".xsf" => "application/prs.xsf+xml",
+	".pskcxml" => "application/pskc+xml",
+	".rdf" => "application/rdf+xml",
+	".rif" => "application/reginfo+xml",
+	".rnc" => "application/relax-ng-compact-syntax",
+	".rl" => "application/resource-lists+xml",
+	".rld" => "application/resource-lists-diff+xml",
+	".rfcxml" => "application/rfc+xml",
+	".rs" => "application/rls-services+xml",
+	".rapd" => "application/route-apd+xml",
+	".sls" => "application/route-s-tsid+xml",
+	".rusd" => "application/route-usd+xml",
+	".gbr" => "application/rpki-ghostbusters",
+	".mft" => "application/rpki-manifest",
+	".roa" => "application/rpki-roa",
+	".rss" => "application/rss+xml",
+	".rtf" => "application/rtf",
+	".sarif" => "application/sarif+json",
+	".sarif-external-properties" => "application/sarif-external-properties+json",
+	".scim" => "application/scim+json",
+	".scq" => "application/scvp-cv-request",
+	".scs" => "application/scvp-cv-response",
+	".spq" => "application/scvp-vp-request",
+	".spp" => "application/scvp-vp-response",
+	".sdp" => "application/sdp",
+	".senmlc" => "application/senml+cbor",
+	".senml" => "application/senml+json",
+	".senmlx" => "application/senml+xml",
+	".senml-etchc" => "application/senml-etch+cbor",
+	".senml-etchj" => "application/senml-etch+json",
+	".senmle" => "application/senml-exi",
+	".sensmlc" => "application/sensml+cbor",
+	".sensml" => "application/sensml+json",
+	".sensmlx" => "application/sensml+xml",
+	".sensmle" => "application/sensml-exi",
+	".soc" => "application/sgml-open-catalog",
+	".shf" => "application/shf+xml",
+	".sieve" => "application/sieve",
+	".siv" => "application/sieve",
+	".cl" => "application/simple-filter+xml",
+	".smi" => "application/smil+xml",
+	".smil" => "application/smil+xml",
+	".sml" => "application/smil+xml",
+	".rq" => "application/sparql-query",
+	".srx" => "application/sparql-results+xml",
+	".sql" => "application/sql",
+	".gram" => "application/srgs",
+	".grxml" => "application/srgs+xml",
+	".sru" => "application/sru+xml",
+	".ssml" => "application/ssml+xml",
+	".stix" => "application/stix+json",
+	".swidtag" => "application/swid+xml",
+	".tau" => "application/tamp-apex-update",
+	".auc" => "application/tamp-apex-update-confirm",
+	".tcu" => "application/tamp-community-update",
+	".cuc" => "application/tamp-community-update-confirm",
+	".ter" => "application/tamp-error",
+	".tsa" => "application/tamp-sequence-adjust",
+	".sac" => "application/tamp-sequence-adjust-confirm",
+	".tur" => "application/tamp-update",
+	".tuc" => "application/tamp-update-confirm",
+	".jsontd" => "application/td+json",
+	".odd" => "application/tei+xml",
+	".tei" => "application/tei+xml",
+	".teiCorpus" => "application/tei+xml",
+	".tfi" => "application/thraud+xml",
+	".tsq" => "application/timestamp-query",
+	".tsr" => "application/timestamp-reply",
+	".tsd" => "application/timestamped-data",
+	".trig" => "application/trig",
+	".ttml" => "application/ttml+xml",
+	".gsheet" => "application/urc-grpsheet+xml",
+	".rsheet" => "application/urc-ressheet+xml",
+	".td" => "application/urc-targetdesc+xml",
+	".uis" => "application/urc-uisocketdesc+xml",
+	".vxml" => "application/voicexml+xml",
+	".vcj" => "application/voucher-cms+json",
+	".wasm" => "application/wasm",
+	".wif" => "application/watcherinfo+xml",
+	".wgt" => "application/widget",
+	".wsdl" => "application/wsdl+xml",
+	".wspolicy" => "application/wspolicy+xml",
+	".xav" => "application/xcap-att+xml",
+	".xca" => "application/xcap-caps+xml",
+	".xdf" => "application/xcap-diff+xml",
+	".xel" => "application/xcap-el+xml",
+	".xer" => "application/xcap-error+xml",
+	".xns" => "application/xcap-ns+xml",
+	".xht" => "application/xhtml+xml",
+	".xhtm" => "application/xhtml+xml",
+	".xhtml" => "application/xhtml+xml",
+	".xlf" => "application/xliff+xml",
+	".dtd" => "application/xml-dtd",
+	".xop" => "application/xop+xml",
+	".xsl" => "application/xslt+xml",
+	".xslt" => "application/xslt+xml",
+	".mxml" => "application/xv+xml",
+	".xhvml" => "application/xv+xml",
+	".xvm" => "application/xv+xml",
+	".xvml" => "application/xv+xml",
+	".yang" => "application/yang",
+	".yin" => "application/yin+xml",
+	".zip" => "application/zip",
+	".zst" => "application/zstd",
+	".1km" => "application/vnd.1000minds.decision-model+xml",
+	".pwn" => "application/vnd.3M.Post-it-Notes",
+	".plb" => "application/vnd.3gpp.pic-bw-large",
+	".psb" => "application/vnd.3gpp.pic-bw-small",
+	".pvb" => "application/vnd.3gpp.pic-bw-var",
+	".sms" => "application/vnd.3gpp2.sms",
+	".tcap" => "application/vnd.3gpp2.tcap",
+	".imgcal" => "application/vnd.3lightssoftware.imagescal",
+	".gph" => "application/vnd.FloGraphIt",
+	".zmm" => "application/vnd.HandHeld-Entertainment+xml",
+	".kne" => "application/vnd.Kinar",
+	".knp" => "application/vnd.Kinar",
+	".sdf" => "application/vnd.Kinar",
+	".mwf" => "application/vnd.MFER",
+	".daf" => "application/vnd.Mobius.DAF",
+	".dis" => "application/vnd.Mobius.DIS",
+	".mbk" => "application/vnd.Mobius.MBK",
+	".mqy" => "application/vnd.Mobius.MQY",
+	".msl" => "application/vnd.Mobius.MSL",
+	".plc" => "application/vnd.Mobius.PLC",
+	".txf" => "application/vnd.Mobius.TXF",
+	".qwd" => "application/vnd.Quark.QuarkXPress",
+	".qwt" => "application/vnd.Quark.QuarkXPress",
+	".qxb" => "application/vnd.Quark.QuarkXPress",
+	".qxd" => "application/vnd.Quark.QuarkXPress",
+	".qxl" => "application/vnd.Quark.QuarkXPress",
+	".qxt" => "application/vnd.Quark.QuarkXPress",
+	".twd" => "application/vnd.SimTech-MindMapper",
+	".twds" => "application/vnd.SimTech-MindMapper",
+	".aso" => "application/vnd.accpac.simply.aso",
+	".imp" => "application/vnd.accpac.simply.imp",
+	".acu" => "application/vnd.acucobol",
+	".acutc" => "application/vnd.acucorp",
+	".atc" => "application/vnd.acucorp",
+	".swf" => "application/vnd.adobe.flash.movie",
+	".fcdt" => "application/vnd.adobe.formscentral.fcdt",
+	".fxp" => "application/vnd.adobe.fxp",
+	".fxpl" => "application/vnd.adobe.fxp",
+	".xdp" => "application/vnd.adobe.xdp+xml",
+	".xfdf" => "application/vnd.adobe.xfdf",
+	".afp" => "application/vnd.afpc.modca",
+	".list3820" => "application/vnd.afpc.modca",
+	".listafp" => "application/vnd.afpc.modca",
+	".pseg3820" => "application/vnd.afpc.modca",
+	".ovl" => "application/vnd.afpc.modca-overlay",
+	".psg" => "application/vnd.afpc.modca-pagesegment",
+	".ahead" => "application/vnd.ahead.space",
+	".azf" => "application/vnd.airzip.filesecure.azf",
+	".azs" => "application/vnd.airzip.filesecure.azs",
+	".azw3" => "application/vnd.amazon.mobi8-ebook",
+	".acc" => "application/vnd.americandynamics.acc",
+	".ami" => "application/vnd.amiga.ami",
+	".ota" => "application/vnd.android.ota",
+	".apk" => "application/vnd.android.package-archive",
+	".apkg" => "application/vnd.anki",
+	".cii" => "application/vnd.anser-web-certificate-issue-initiation",
+	".fti" => "application/vnd.anser-web-funds-transfer-initiation",
+	".dist" => "application/vnd.apple.installer+xml",
+	".distz" => "application/vnd.apple.installer+xml",
+	".mpkg" => "application/vnd.apple.installer+xml",
+	".pkg" => "application/vnd.apple.installer+xml",
+	".keynote" => "application/vnd.apple.keynote",
+	".m3u8" => "application/vnd.apple.mpegurl",
+	".numbers" => "application/vnd.apple.numbers",
+	".pages" => "application/vnd.apple.pages",
+	".swi" => "application/vnd.aristanetworks.swi",
+	".artisan" => "application/vnd.artisan+json",
+	".iota" => "application/vnd.astraea-software.iota",
+	".aep" => "application/vnd.audiograph",
+	".package" => "application/vnd.autopackage",
+	".bmml" => "application/vnd.balsamiq.bmml+xml",
+	".bmpr" => "application/vnd.balsamiq.bmpr",
+	".ac2" => "application/vnd.banana-accounting",
+	".mpm" => "application/vnd.blueice.multipass",
+	".ep" => "application/vnd.bluetooth.ep.oob",
+	".le" => "application/vnd.bluetooth.le.oob",
+	".bmi" => "application/vnd.bmi",
+	".rep" => "application/vnd.businessobjects",
+	".tlclient" => "application/vnd.cendio.thinlinc.clientconf",
+	".cdxml" => "application/vnd.chemdraw+xml",
+	".pgn" => "application/vnd.chess-pgn",
+	".mmd" => "application/vnd.chipnuts.karaoke-mmd",
+	".cdy" => "application/vnd.cinderella",
+	".csl" => "application/vnd.citationstyles.style+xml",
+	".cla" => "application/vnd.claymore",
+	".rp9" => "application/vnd.cloanto.rp9",
+	".c4d" => "application/vnd.clonk.c4group",
+	".c4f" => "application/vnd.clonk.c4group",
+	".c4g" => "application/vnd.clonk.c4group",
+	".c4p" => "application/vnd.clonk.c4group",
+	".c4u" => "application/vnd.clonk.c4group",
+	".c11amc" => "application/vnd.cluetrust.cartomobile-config",
+	".c11amz" => "application/vnd.cluetrust.cartomobile-config-pkg",
+	".coffee" => "application/vnd.coffeescript",
+	".xodt" => "application/vnd.collabio.xodocuments.document",
+	".xott" => "application/vnd.collabio.xodocuments.document-template",
+	".xodp" => "application/vnd.collabio.xodocuments.presentation",
+	".xotp" => "application/vnd.collabio.xodocuments.presentation-template",
+	".xods" => "application/vnd.collabio.xodocuments.spreadsheet",
+	".xots" => "application/vnd.collabio.xodocuments.spreadsheet-template",
+	".cbz" => "application/vnd.comicbook+zip",
+	".cbr" => "application/vnd.comicbook-rar",
+	".ic0" => "application/vnd.commerce-battelle",
+	".ic1" => "application/vnd.commerce-battelle",
+	".ic2" => "application/vnd.commerce-battelle",
+	".ic3" => "application/vnd.commerce-battelle",
+	".ic4" => "application/vnd.commerce-battelle",
+	".ic5" => "application/vnd.commerce-battelle",
+	".ic6" => "application/vnd.commerce-battelle",
+	".ic7" => "application/vnd.commerce-battelle",
+	".ic8" => "application/vnd.commerce-battelle",
+	".ica" => "application/vnd.commerce-battelle",
+	".icd" => "application/vnd.commerce-battelle",
+	".icf" => "application/vnd.commerce-battelle",
+	".csp" => "application/vnd.commonspace",
+	".cst" => "application/vnd.commonspace",
+	".cdbcmsg" => "application/vnd.contact.cmsg",
+	".ign" => "application/vnd.coreos.ignition+json",
+	".ignition" => "application/vnd.coreos.ignition+json",
+	".cmc" => "application/vnd.cosmocaller",
+	".clkx" => "application/vnd.crick.clicker",
+	".clkk" => "application/vnd.crick.clicker.keyboard",
+	".clkp" => "application/vnd.crick.clicker.palette",
+	".clkt" => "application/vnd.crick.clicker.template",
+	".clkw" => "application/vnd.crick.clicker.wordbank",
+	".wbs" => "application/vnd.criticaltools.wbs+xml",
+	".ssvc" => "application/vnd.crypto-shade-file",
+	".c9r" => "application/vnd.cryptomator.encrypted",
+	".c9s" => "application/vnd.cryptomator.encrypted",
+	".cryptomator" => "application/vnd.cryptomator.vault",
+	".pml" => "application/vnd.ctc-posml",
+	".ppd" => "application/vnd.cups-ppd",
+	".curl" => "application/vnd.curl",
+	".dart" => "application/vnd.dart",
+	".rdz" => "application/vnd.data-vision.rdz",
+	".dbf" => "application/vnd.dbf",
+	".deb" => "application/vnd.debian.binary-package",
+	".udeb" => "application/vnd.debian.binary-package",
+	".uvd" => "application/vnd.dece.data",
+	".uvf" => "application/vnd.dece.data",
+	".uvvd" => "application/vnd.dece.data",
+	".uvvf" => "application/vnd.dece.data",
+	".uvt" => "application/vnd.dece.ttml+xml",
+	".uvvt" => "application/vnd.dece.ttml+xml",
+	".uvvx" => "application/vnd.dece.unspecified",
+	".uvx" => "application/vnd.dece.unspecified",
+	".uvvz" => "application/vnd.dece.zip",
+	".uvz" => "application/vnd.dece.zip",
+	".dsm" => "application/vnd.desmume.movie",
+	".dna" => "application/vnd.dna",
+	".docjson" => "application/vnd.document+json",
+	".scld" => "application/vnd.doremir.scorecloud-binary-document",
+	".dpg" => "application/vnd.dpgraph",
+	".dpgraph" => "application/vnd.dpgraph",
+	".mwc" => "application/vnd.dpgraph",
+	".dfac" => "application/vnd.dreamfactory",
+	".fla" => "application/vnd.dtg.local.flash",
+	".ait" => "application/vnd.dvb.ait",
+	".svc" => "application/vnd.dvb.service",
+	".geo" => "application/vnd.dynageo",
+	".dzr" => "application/vnd.dzr",
+	".mag" => "application/vnd.ecowin.chart",
+	".nml" => "application/vnd.enliven",
+	".esf" => "application/vnd.epson.esf",
+	".msf" => "application/vnd.epson.msf",
+	".qam" => "application/vnd.epson.quickanime",
+	".slt" => "application/vnd.epson.salt",
+	".ssf" => "application/vnd.epson.ssf",
+	".qca" => "application/vnd.ericsson.quickcall",
+	".qcall" => "application/vnd.ericsson.quickcall",
+	".espass" => "application/vnd.espass-espass+zip",
+	".es3" => "application/vnd.eszigno3+xml",
+	".et3" => "application/vnd.eszigno3+xml",
+	".asice" => "application/vnd.etsi.asic-e+zip",
+	".sce" => "application/vnd.etsi.asic-e+zip",
+	".asics" => "application/vnd.etsi.asic-s+zip",
+	".tst" => "application/vnd.etsi.timestamp-token",
+	".ecigprofile" => "application/vnd.evolv.ecig.profile",
+	".ecig" => "application/vnd.evolv.ecig.settings",
+	".ecigtheme" => "application/vnd.evolv.ecig.theme",
+	".mpw" => "application/vnd.exstream-empower+zip",
+	".pub" => "application/vnd.exstream-package",
+	".ez2" => "application/vnd.ezpix-album",
+	".ez3" => "application/vnd.ezpix-package",
+	".dim" => "application/vnd.fastcopy-disk-image",
+	".fdf" => "application/vnd.fdf",
+	".msd" => "application/vnd.fdsn.mseed",
+	".mseed" => "application/vnd.fdsn.mseed",
+	".dataless" => "application/vnd.fdsn.seed",
+	".seed" => "application/vnd.fdsn.seed",
+	".flb" => "application/vnd.ficlab.flb+zip",
+	".zfc" => "application/vnd.filmit.zfc",
+	".ftc" => "application/vnd.fluxtime.clip",
+	".sfd" => "application/vnd.font-fontforge-sfd",
+	".fm" => "application/vnd.framemaker",
+	".fnc" => "application/vnd.frogans.fnc",
+	".ltf" => "application/vnd.frogans.ltf",
+	".fsc" => "application/vnd.fsc.weblaunch",
+	".oas" => "application/vnd.fujitsu.oasys",
+	".oa2" => "application/vnd.fujitsu.oasys2",
+	".oa3" => "application/vnd.fujitsu.oasys3",
+	".fg5" => "application/vnd.fujitsu.oasysgp",
+	".bh2" => "application/vnd.fujitsu.oasysprs",
+	".ddd" => "application/vnd.fujixerox.ddd",
+	".xdw" => "application/vnd.fujixerox.docuworks",
+	".xbd" => "application/vnd.fujixerox.docuworks.binder",
+	".xct" => "application/vnd.fujixerox.docuworks.container",
+	".fzs" => "application/vnd.fuzzysheet",
+	".txd" => "application/vnd.genomatix.tuxedo",
+	".ggb" => "application/vnd.geogebra.file",
+	".ggs" => "application/vnd.geogebra.slides",
+	".ggt" => "application/vnd.geogebra.tool",
+	".gex" => "application/vnd.geometry-explorer",
+	".gre" => "application/vnd.geometry-explorer",
+	".gxt" => "application/vnd.geonext",
+	".g2w" => "application/vnd.geoplan",
+	".g3w" => "application/vnd.geospace",
+	".gmx" => "application/vnd.gmx",
+	".kml" => "application/vnd.google-earth.kml+xml",
+	".kmz" => "application/vnd.google-earth.kmz",
+	".gqf" => "application/vnd.grafeq",
+	".gqs" => "application/vnd.grafeq",
+	".gac" => "application/vnd.groove-account",
+	".ghf" => "application/vnd.groove-help",
+	".gim" => "application/vnd.groove-identity-message",
+	".grv" => "application/vnd.groove-injector",
+	".gtm" => "application/vnd.groove-tool-message",
+	".tpl" => "application/vnd.groove-tool-template",
+	".vcg" => "application/vnd.groove-vcard",
+	".hal" => "application/vnd.hal+xml",
+	".bpd" => "application/vnd.hbci",
+	".hbc" => "application/vnd.hbci",
+	".hbci" => "application/vnd.hbci",
+	".kom" => "application/vnd.hbci",
+	".pkd" => "application/vnd.hbci",
+	".upa" => "application/vnd.hbci",
+	".hdt" => "application/vnd.hdt",
+	".les" => "application/vnd.hhe.lesson-player",
+	".hpgl" => "application/vnd.hp-HPGL",
+	".pcl" => "application/vnd.hp-PCL",
+	".hpi" => "application/vnd.hp-hpid",
+	".hpid" => "application/vnd.hp-hpid",
+	".hps" => "application/vnd.hp-hps",
+	".jlt" => "application/vnd.hp-jlyt",
+	".sfd-hdstx" => "application/vnd.hydrostatix.sof-data",
+	".x3d" => "application/vnd.hzn-3d-crossword",
+	".mpy" => "application/vnd.ibm.MiniPay",
+	".emm" => "application/vnd.ibm.electronic-media",
+	".irm" => "application/vnd.ibm.rights-management",
+	".sc" => "application/vnd.ibm.secure-container",
+	".icc" => "application/vnd.iccprofile",
+	".icm" => "application/vnd.iccprofile",
+	".igl" => "application/vnd.igloader",
+	".imf" => "application/vnd.imagemeter.folder+zip",
+	".imi" => "application/vnd.imagemeter.image+zip",
+	".ivp" => "application/vnd.immervision-ivp",
+	".ivu" => "application/vnd.immervision-ivu",
+	".imscc" => "application/vnd.ims.imsccv1p1",
+	".igm" => "application/vnd.insors.igm",
+	".xpw" => "application/vnd.intercon.formnet",
+	".xpx" => "application/vnd.intercon.formnet",
+	".i2g" => "application/vnd.intergeo",
+	".qbo" => "application/vnd.intu.qbo",
+	".qfx" => "application/vnd.intu.qfx",
+	".rcprofile" => "application/vnd.ipunplugged.rcprofile",
+	".irp" => "application/vnd.irepository.package+xml",
+	".xpr" => "application/vnd.is-xpr",
+	".fcs" => "application/vnd.isac.fcs",
+	".jam" => "application/vnd.jam",
+	".rms" => "application/vnd.jcp.javame.midlet-rms",
+	".jisp" => "application/vnd.jisp",
+	".joda" => "application/vnd.joost.joda-archive",
+	".ktr" => "application/vnd.kahootz",
+	".ktz" => "application/vnd.kahootz",
+	".karbon" => "application/vnd.kde.karbon",
+	".chrt" => "application/vnd.kde.kchart",
+	".kfo" => "application/vnd.kde.kformula",
+	".flw" => "application/vnd.kde.kivio",
+	".kon" => "application/vnd.kde.kontour",
+	".kpr" => "application/vnd.kde.kpresenter",
+	".kpt" => "application/vnd.kde.kpresenter",
+	".ksp" => "application/vnd.kde.kspread",
+	".kwd" => "application/vnd.kde.kword",
+	".kwt" => "application/vnd.kde.kword",
+	".htke" => "application/vnd.kenameaapp",
+	".kia" => "application/vnd.kidspiration",
+	".skd" => "application/vnd.koan",
+	".skm" => "application/vnd.koan",
+	".skp" => "application/vnd.koan",
+	".skt" => "application/vnd.koan",
+	".sse" => "application/vnd.kodak-descriptor",
+	".las" => "application/vnd.las",
+	".lasjson" => "application/vnd.las.las+json",
+	".lasxml" => "application/vnd.las.las+xml",
+	".lbd" => "application/vnd.llamagraphics.life-balance.desktop",
+	".lbe" => "application/vnd.llamagraphics.life-balance.exchange+xml",
+	".lca" => "application/vnd.logipipe.circuit+zip",
+	".lcs" => "application/vnd.logipipe.circuit+zip",
+	".loom" => "application/vnd.loom",
+	".123" => "application/vnd.lotus-1-2-3",
+	".wk1" => "application/vnd.lotus-1-2-3",
+	".wk3" => "application/vnd.lotus-1-2-3",
+	".wk4" => "application/vnd.lotus-1-2-3",
+	".apr" => "application/vnd.lotus-approach",
+	".vew" => "application/vnd.lotus-approach",
+	".pre" => "application/vnd.lotus-freelance",
+	".prz" => "application/vnd.lotus-freelance",
+	".ndl" => "application/vnd.lotus-notes",
+	".ns2" => "application/vnd.lotus-notes",
+	".ns3" => "application/vnd.lotus-notes",
+	".ns4" => "application/vnd.lotus-notes",
+	".nsf" => "application/vnd.lotus-notes",
+	".nsg" => "application/vnd.lotus-notes",
+	".nsh" => "application/vnd.lotus-notes",
+	".ntf" => "application/vnd.lotus-notes",
+	".or2" => "application/vnd.lotus-organizer",
+	".or3" => "application/vnd.lotus-organizer",
+	".org" => "application/vnd.lotus-organizer",
+	".scm" => "application/vnd.lotus-screencam",
+	".lwp" => "application/vnd.lotus-wordpro",
+	".sam" => "application/vnd.lotus-wordpro",
+	".portpkg" => "application/vnd.macports.portpkg",
+	".mvt" => "application/vnd.mapbox-vector-tile",
+	".mdc" => "application/vnd.marlin.drm.mdcf",
+	".mmdb" => "application/vnd.maxmind.maxmind-db",
+	".mcd" => "application/vnd.mcd",
+	".mc1" => "application/vnd.medcalcdata",
+	".cdkey" => "application/vnd.mediastation.cdkey",
+	".mfm" => "application/vnd.mfmp",
+	".flo" => "application/vnd.micrografx.flo",
+	".igx" => "application/vnd.micrografx.igx",
+	".mif" => "application/vnd.mif",
+	".mpn" => "application/vnd.mophun.application",
+	".mpc" => "application/vnd.mophun.certificate",
+	".xul" => "application/vnd.mozilla.xul+xml",
+	".3mf" => "application/vnd.ms-3mfdocument",
+	".cil" => "application/vnd.ms-artgalry",
+	".asf" => "application/vnd.ms-asf",
+	".cab" => "application/vnd.ms-cab-compressed",
+	".xla" => "application/vnd.ms-excel",
+	".xlc" => "application/vnd.ms-excel",
+	".xlm" => "application/vnd.ms-excel",
+	".xls" => "application/vnd.ms-excel",
+	".xlt" => "application/vnd.ms-excel",
+	".xlw" => "application/vnd.ms-excel",
+	".xlam" => "application/vnd.ms-excel.addin.macroEnabled.12",
+	".xlsb" => "application/vnd.ms-excel.sheet.binary.macroEnabled.12",
+	".xlsm" => "application/vnd.ms-excel.sheet.macroEnabled.12",
+	".xltm" => "application/vnd.ms-excel.template.macroEnabled.12",
+	".eot" => "application/vnd.ms-fontobject",
+	".chm" => "application/vnd.ms-htmlhelp",
+	".ims" => "application/vnd.ms-ims",
+	".lrm" => "application/vnd.ms-lrm",
+	".thmx" => "application/vnd.ms-officetheme",
+	".pot" => "application/vnd.ms-powerpoint",
+	".pps" => "application/vnd.ms-powerpoint",
+	".ppt" => "application/vnd.ms-powerpoint",
+	".ppam" => "application/vnd.ms-powerpoint.addin.macroEnabled.12",
+	".pptm" => "application/vnd.ms-powerpoint.presentation.macroEnabled.12",
+	".sldm" => "application/vnd.ms-powerpoint.slide.macroEnabled.12",
+	".ppsm" => "application/vnd.ms-powerpoint.slideshow.macroEnabled.12",
+	".potm" => "application/vnd.ms-powerpoint.template.macroEnabled.12",
+	".mpp" => "application/vnd.ms-project",
+	".mpt" => "application/vnd.ms-project",
+	".tnef" => "application/vnd.ms-tnef",
+	".tnf" => "application/vnd.ms-tnef",
+	".docm" => "application/vnd.ms-word.document.macroEnabled.12",
+	".dotm" => "application/vnd.ms-word.template.macroEnabled.12",
+	".wcm" => "application/vnd.ms-works",
+	".wdb" => "application/vnd.ms-works",
+	".wks" => "application/vnd.ms-works",
+	".wps" => "application/vnd.ms-works",
+	".wpl" => "application/vnd.ms-wpl",
+	".xps" => "application/vnd.ms-xpsdocument",
+	".msa" => "application/vnd.msa-disk-image",
+	".mseq" => "application/vnd.mseq",
+	".crtr" => "application/vnd.multiad.creator",
+	".cif" => "application/vnd.multiad.creator.cif",
+	".mus" => "application/vnd.musician",
+	".msty" => "application/vnd.muvee.style",
+	".taglet" => "application/vnd.mynfc",
+	".line" => "application/vnd.nebumind.line",
+	".nebul" => "application/vnd.nebumind.line",
+	".bkm" => "application/vnd.nervana",
+	".entity" => "application/vnd.nervana",
+	".kcm" => "application/vnd.nervana",
+	".request" => "application/vnd.nervana",
+	".nlu" => "application/vnd.neurolanguage.nlu",
+	".nimn" => "application/vnd.nimn",
+	".nds" => "application/vnd.nintendo.nitro.rom",
+	".sfc" => "application/vnd.nintendo.snes.rom",
+	".smc" => "application/vnd.nintendo.snes.rom",
+	".nitf" => "application/vnd.nitf",
+	".nnd" => "application/vnd.noblenet-directory",
+	".nns" => "application/vnd.noblenet-sealer",
+	".nnw" => "application/vnd.noblenet-web",
+	".ac" => "application/vnd.nokia.n-gage.ac+xml",
+	".ngdat" => "application/vnd.nokia.n-gage.data",
+	".n-gage" => "application/vnd.nokia.n-gage.symbian.install",
+	".rpst" => "application/vnd.nokia.radio-preset",
+	".rpss" => "application/vnd.nokia.radio-presets",
+	".edm" => "application/vnd.novadigm.EDM",
+	".edx" => "application/vnd.novadigm.EDX",
+	".ext" => "application/vnd.novadigm.EXT",
+	".odc" => "application/vnd.oasis.opendocument.chart",
+	".otc" => "application/vnd.oasis.opendocument.chart-template",
+	".odb" => "application/vnd.oasis.opendocument.database",
+	".odf" => "application/vnd.oasis.opendocument.formula",
+	".odg" => "application/vnd.oasis.opendocument.graphics",
+	".otg" => "application/vnd.oasis.opendocument.graphics-template",
+	".odi" => "application/vnd.oasis.opendocument.image",
+	".oti" => "application/vnd.oasis.opendocument.image-template",
+	".odp" => "application/vnd.oasis.opendocument.presentation",
+	".otp" => "application/vnd.oasis.opendocument.presentation-template",
+	".ods" => "application/vnd.oasis.opendocument.spreadsheet",
+	".ots" => "application/vnd.oasis.opendocument.spreadsheet-template",
+	".odt" => "application/vnd.oasis.opendocument.text",
+	".odm" => "application/vnd.oasis.opendocument.text-master",
+	".ott" => "application/vnd.oasis.opendocument.text-template",
+	".oth" => "application/vnd.oasis.opendocument.text-web",
+	".xo" => "application/vnd.olpc-sugar",
+	".dd" => "application/vnd.oma.dd+xml",
+	".dd2" => "application/vnd.oma.dd2+xml",
+	".dcf" => "application/vnd.oma.drm.content",
+	".o4a" => "application/vnd.oma.drm.dcf",
+	".o4v" => "application/vnd.oma.drm.dcf",
+	".dm" => "application/vnd.oma.drm.message",
+	".drc" => "application/vnd.oma.drm.rights+wbxml",
+	".dr" => "application/vnd.oma.drm.rights+xml",
+	".tam" => "application/vnd.onepager",
+	".tamp" => "application/vnd.onepagertamp",
+	".tamx" => "application/vnd.onepagertamx",
+	".tat" => "application/vnd.onepagertat",
+	".tatp" => "application/vnd.onepagertatp",
+	".tatx" => "application/vnd.onepagertatx",
+	".obgx" => "application/vnd.openblox.game+xml",
+	".obg" => "application/vnd.openblox.game-binary",
+	".oeb" => "application/vnd.openeye.oeb",
+	".oxt" => "application/vnd.openofficeorg.extension",
+	".osm" => "application/vnd.openstreetmap.data+xml",
+	".pptx" => "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+	".sldx" => "application/vnd.openxmlformats-officedocument.presentationml.slide",
+	".ppsx" => "application/vnd.openxmlformats-officedocument.presentationml.slideshow",
+	".potx" => "application/vnd.openxmlformats-officedocument.presentationml.template",
+	".xlsx" => "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+	".xltx" => "application/vnd.openxmlformats-officedocument.spreadsheetml.template",
+	".docx" => "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+	".dotx" => "application/vnd.openxmlformats-officedocument.wordprocessingml.template",
+	".ndc" => "application/vnd.osa.netdeploy",
+	".mgp" => "application/vnd.osgeo.mapguide.package",
+	".dp" => "application/vnd.osgi.dp",
+	".esa" => "application/vnd.osgi.subsystem",
+	".oxlicg" => "application/vnd.oxli.countgraph",
+	".oprc" => "application/vnd.palm",
+	".pdb" => "application/vnd.palm",
+	".pqa" => "application/vnd.palm",
+	".prc" => "application/vnd.palm",
+	".plp" => "application/vnd.panoply",
+	".dive" => "application/vnd.patentdive",
+	".paw" => "application/vnd.pawaafile",
+	".str" => "application/vnd.pg.format",
+	".ei6" => "application/vnd.pg.osasli",
+	".pil" => "application/vnd.piaccess.application-licence",
+	".efif" => "application/vnd.picsel",
+	".wg" => "application/vnd.pmi.widget",
+	".plf" => "application/vnd.pocketlearn",
+	".pbd" => "application/vnd.powerbuilder6",
+	".preminet" => "application/vnd.preminet",
+	".box" => "application/vnd.previewsystems.box",
+	".vbox" => "application/vnd.previewsystems.box",
+	".mgz" => "application/vnd.proteus.magazine",
+	".psfs" => "application/vnd.psfs",
+	".qps" => "application/vnd.publishare-delta-tree",
+	".ptid" => "application/vnd.pvi.ptid1",
+	".bar" => "application/vnd.qualcomm.brew-app-res",
+	".quiz" => "application/vnd.quobject-quoxdocument",
+	".quox" => "application/vnd.quobject-quoxdocument",
+	".tree" => "application/vnd.rainstor.data",
+	".rar" => "application/vnd.rar",
+	".bed" => "application/vnd.realvnc.bed",
+	".mxl" => "application/vnd.recordare.musicxml",
+	".cryptonote" => "application/vnd.rig.cryptonote",
+	".link66" => "application/vnd.route66.link66+xml",
+	".st" => "application/vnd.sailingtracker.track",
+	".SAR" => "application/vnd.sar",
+	".scd" => "application/vnd.scribus",
+	".sla" => "application/vnd.scribus",
+	".slaz" => "application/vnd.scribus",
+	".s3df" => "application/vnd.sealed.3df",
+	".scsf" => "application/vnd.sealed.csf",
+	".s1w" => "application/vnd.sealed.doc",
+	".sdo" => "application/vnd.sealed.doc",
+	".sdoc" => "application/vnd.sealed.doc",
+	".sem" => "application/vnd.sealed.eml",
+	".seml" => "application/vnd.sealed.eml",
+	".smh" => "application/vnd.sealed.mht",
+	".smht" => "application/vnd.sealed.mht",
+	".s1p" => "application/vnd.sealed.ppt",
+	".sppt" => "application/vnd.sealed.ppt",
+	".stif" => "application/vnd.sealed.tiff",
+	".s1e" => "application/vnd.sealed.xls",
+	".sxl" => "application/vnd.sealed.xls",
+	".sxls" => "application/vnd.sealed.xls",
+	".s1h" => "application/vnd.sealedmedia.softseal.html",
+	".stml" => "application/vnd.sealedmedia.softseal.html",
+	".s1a" => "application/vnd.sealedmedia.softseal.pdf",
+	".spd" => "application/vnd.sealedmedia.softseal.pdf",
+	".spdf" => "application/vnd.sealedmedia.softseal.pdf",
+	".see" => "application/vnd.seemail",
+	".sema" => "application/vnd.sema",
+	".semd" => "application/vnd.semd",
+	".semf" => "application/vnd.semf",
+	".ssv" => "application/vnd.shade-save-file",
+	".ifm" => "application/vnd.shana.informed.formdata",
+	".itp" => "application/vnd.shana.informed.formtemplate",
+	".iif" => "application/vnd.shana.informed.interchange",
+	".ipk" => "application/vnd.shana.informed.package",
+	".shp" => "application/vnd.shp",
+	".shx" => "application/vnd.shx",
+	".sr" => "application/vnd.sigrok.session",
+	".mmf" => "application/vnd.smaf",
+	".notebook" => "application/vnd.smart.notebook",
+	".teacher" => "application/vnd.smart.teacher",
+	".pt" => "application/vnd.snesdev-page-table",
+	".ptrom" => "application/vnd.snesdev-page-table",
+	".fo" => "application/vnd.software602.filler.form+xml",
+	".zfo" => "application/vnd.software602.filler.form-xml-zip",
+	".sdkd" => "application/vnd.solent.sdkm+xml",
+	".sdkm" => "application/vnd.solent.sdkm+xml",
+	".dxp" => "application/vnd.spotfire.dxp",
+	".sfs" => "application/vnd.spotfire.sfs",
+	".sqlite" => "application/vnd.sqlite3",
+	".sqlite3" => "application/vnd.sqlite3",
+	".smzip" => "application/vnd.stepmania.package",
+	".sm" => "application/vnd.stepmania.stepchart",
+	".wadl" => "application/vnd.sun.wadl+xml",
+	".sxc" => "application/vnd.sun.xml.calc",
+	".stc" => "application/vnd.sun.xml.calc.template",
+	".sxd" => "application/vnd.sun.xml.draw",
+	".std" => "application/vnd.sun.xml.draw.template",
+	".sxi" => "application/vnd.sun.xml.impress",
+	".sti" => "application/vnd.sun.xml.impress.template",
+	".sxm" => "application/vnd.sun.xml.math",
+	".sxw" => "application/vnd.sun.xml.writer",
+	".sxg" => "application/vnd.sun.xml.writer.global",
+	".stw" => "application/vnd.sun.xml.writer.template",
+	".sus" => "application/vnd.sus-calendar",
+	".susp" => "application/vnd.sus-calendar",
+	".scl" => "application/vnd.sycle+xml",
+	".sis" => "application/vnd.symbian.install",
+	".xsm" => "application/vnd.syncml+xml",
+	".bdm" => "application/vnd.syncml.dm+wbxml",
+	".xdm" => "application/vnd.syncml.dm+xml",
+	".ddf" => "application/vnd.syncml.dmddf+xml",
+	".tao" => "application/vnd.tao.intent-module-archive",
+	".cap" => "application/vnd.tcpdump.pcap",
+	".dmp" => "application/vnd.tcpdump.pcap",
+	".pcap" => "application/vnd.tcpdump.pcap",
+	".qvd" => "application/vnd.theqvd",
+	".ppttc" => "application/vnd.think-cell.ppttc+json",
+	".vfr" => "application/vnd.tml",
+	".viaframe" => "application/vnd.tml",
+	".tmo" => "application/vnd.tmobile-livetv",
+	".tpt" => "application/vnd.trid.tpt",
+	".mxs" => "application/vnd.triscape.mxs",
+	".tra" => "application/vnd.trueapp",
+	".frm" => "application/vnd.ufdl",
+	".ufd" => "application/vnd.ufdl",
+	".ufdl" => "application/vnd.ufdl",
+	".utz" => "application/vnd.uiq.theme",
+	".umj" => "application/vnd.umajin",
+	".unityweb" => "application/vnd.unity",
+	".uo" => "application/vnd.uoml+xml",
+	".uoml" => "application/vnd.uoml+xml",
+	".urim" => "application/vnd.uri-map",
+	".urimap" => "application/vnd.uri-map",
+	".vmt" => "application/vnd.valve.source.material",
+	".vcx" => "application/vnd.vcx",
+	".model-inter" => "application/vnd.vd-study",
+	".mxi" => "application/vnd.vd-study",
+	".study-inter" => "application/vnd.vd-study",
+	".vwx" => "application/vnd.vectorworks",
+	".istc" => "application/vnd.veryant.thin",
+	".isws" => "application/vnd.veryant.thin",
+	".VES" => "application/vnd.ves.encrypted",
+	".vsc" => "application/vnd.vidsoft.vidconference",
+	".vsd" => "application/vnd.visio",
+	".vss" => "application/vnd.visio",
+	".vst" => "application/vnd.visio",
+	".vsw" => "application/vnd.visio",
+	".vis" => "application/vnd.visionary",
+	".vsf" => "application/vnd.vsf",
+	".mms" => "application/vnd.wap.mms-message",
+	".sic" => "application/vnd.wap.sic",
+	".slc" => "application/vnd.wap.slc",
+	".wbxml" => "application/vnd.wap.wbxml",
+	".wmlc" => "application/vnd.wap.wmlc",
+	".wmlsc" => "application/vnd.wap.wmlscriptc",
+	".wtb" => "application/vnd.webturbo",
+	".p2p" => "application/vnd.wfa.p2p",
+	".wsc" => "application/vnd.wfa.wsc",
+	".wmc" => "application/vnd.wmc",
+	".m" => "application/vnd.wolfram.mathematica.package",
+	".nbp" => "application/vnd.wolfram.player",
+	".wpd" => "application/vnd.wordperfect",
+	".wqd" => "application/vnd.wqd",
+	".stf" => "application/vnd.wt.stf",
+	".wv" => "application/vnd.wv.csp+wbxml",
+	".xar" => "application/vnd.xara",
+	".xfd" => "application/vnd.xfdl",
+	".xfdl" => "application/vnd.xfdl",
+	".cpkg" => "application/vnd.xmpie.cpkg",
+	".dpkg" => "application/vnd.xmpie.dpkg",
+	".ppkg" => "application/vnd.xmpie.ppkg",
+	".xlim" => "application/vnd.xmpie.xlim",
+	".hvd" => "application/vnd.yamaha.hv-dic",
+	".hvs" => "application/vnd.yamaha.hv-script",
+	".hvp" => "application/vnd.yamaha.hv-voice",
+	".osf" => "application/vnd.yamaha.openscoreformat",
+	".saf" => "application/vnd.yamaha.smaf-audio",
+	".spf" => "application/vnd.yamaha.smaf-phrase",
+	".yme" => "application/vnd.yaoweme",
+	".cmp" => "application/vnd.yellowriver-custom-menu",
+	".zir" => "application/vnd.zul",
+	".zirz" => "application/vnd.zul",
+	".zaz" => "application/vnd.zzazz.deck+xml",
+	".anx" => "application/x-annodex",
+	".bcpio" => "application/x-bcpio",
+	".torrent" => "application/x-bittorrent",
+	".bz2" => "application/x-bzip2",
+	".vcd" => "application/x-cdlink",
+	".crx" => "application/x-chrome-extension",
+	".cpio" => "application/x-cpio",
+	".csh" => "application/x-csh",
+	".dcr" => "application/x-director",
+	".dir" => "application/x-director",
+	".dxr" => "application/x-director",
+	".dvi" => "application/x-dvi",
+	".spl" => "application/x-futuresplash",
+	".gtar" => "application/x-gtar",
+	".tbz" => "application/x-gtar-compressed",
+	".hdf" => "application/x-hdf",
+	".jar" => "application/x-java-archive",
+	".jnlp" => "application/x-java-jnlp-file",
+	".pack" => "application/x-java-pack200",
+	".kil" => "application/x-killustrator",
+	".latex" => "application/x-latex",
+	".cdf" => "application/x-netcdf",
+	".nc" => "application/x-netcdf",
+	".pl" => "application/x-perl",
+	".rpm" => "application/x-rpm",
+	".sh" => "application/x-sh",
+	".shar" => "application/x-shar",
+	".sit" => "application/x-stuffit",
+	".sv4cpio" => "application/x-sv4cpio",
+	".sv4crc" => "application/x-sv4crc",
+	".tar" => "application/x-tar",
+	".tcl" => "application/x-tcl",
+	".tex" => "application/x-tex",
+	".texi" => "application/x-texinfo",
+	".texinfo" => "application/x-texinfo",
+	".1" => "application/x-troff-man",
+	".2" => "application/x-troff-man",
+	".3" => "application/x-troff-man",
+	".4" => "application/x-troff-man",
+	".5" => "application/x-troff-man",
+	".6" => "application/x-troff-man",
+	".7" => "application/x-troff-man",
+	".8" => "application/x-troff-man",
+	".man" => "application/x-troff-man",
+	".me" => "application/x-troff-me",
+	".ms" => "application/x-troff-ms",
+	".ustar" => "application/x-ustar",
+	".src" => "application/x-wais-source",
+	".xpi" => "application/x-xpinstall",
+	".xspf" => "application/x-xspf+xml",
+	".xz" => "application/x-xz",
+	".726" => "audio/32kadpcm",
+	".amr" => "audio/AMR",
+	".awb" => "audio/AMR-WB",
+	".aal" => "audio/ATRAC-ADVANCED-LOSSLESS",
+	".atx" => "audio/ATRAC-X",
+	".aa3" => "audio/ATRAC3",
+	".at3" => "audio/ATRAC3",
+	".omg" => "audio/ATRAC3",
+	".evc" => "audio/EVRC",
+	".evb" => "audio/EVRCB",
+	".enw" => "audio/EVRCNW",
+	".evw" => "audio/EVRCWB",
+	".l16" => "audio/L16",
+	".qcp" => "audio/QCELP",
+	".smv" => "audio/SMV",
+	".aac" => "audio/aac",
+	".adts" => "audio/aac",
+	".ass" => "audio/aac",
+	".ac3" => "audio/ac3",
+	".acn" => "audio/asc",
+	".au" => "audio/basic",
+	".snd" => "audio/basic",
+	".dls" => "audio/dls",
+	".lbc" => "audio/iLBC",
+	".mhas" => "audio/mhas",
+	".kar" => "audio/midi",
+	".mid" => "audio/midi",
+	".midi" => "audio/midi",
+	".mxmf" => "audio/mobile-xmf",
+	".m4a" => "audio/mp4",
+	".mp1" => "audio/mpeg",
+	".mp2" => "audio/mpeg",
+	".mp3" => "audio/mpeg",
+	".mpga" => "audio/mpeg",
+	".oga" => "audio/ogg",
+	".ogg" => "audio/ogg",
+	".opus" => "audio/ogg",
+	".spx" => "audio/ogg",
+	".psid" => "audio/prs.sid",
+	".sid" => "audio/prs.sid",
+	".sofa" => "audio/sofa",
+	".loas" => "audio/usac",
+	".xhe" => "audio/usac",
+	".koz" => "audio/vnd.audiokoz",
+	".uva" => "audio/vnd.dece.audio",
+	".uvva" => "audio/vnd.dece.audio",
+	".eol" => "audio/vnd.digital-winds",
+	".mlp" => "audio/vnd.dolby.mlp",
+	".dts" => "audio/vnd.dts",
+	".dtshd" => "audio/vnd.dts.hd",
+	".plj" => "audio/vnd.everad.plj",
+	".lvp" => "audio/vnd.lucent.voice",
+	".pya" => "audio/vnd.ms-playready.media.pya",
+	".vbk" => "audio/vnd.nortel.vbk",
+	".ecelp4800" => "audio/vnd.nuera.ecelp4800",
+	".ecelp7470" => "audio/vnd.nuera.ecelp7470",
+	".ecelp9600" => "audio/vnd.nuera.ecelp9600",
+	".multitrack" => "audio/vnd.presonus.multitrack",
+	".rip" => "audio/vnd.rip",
+	".s1m" => "audio/vnd.sealedmedia.softseal.mpeg",
+	".smp" => "audio/vnd.sealedmedia.softseal.mpeg",
+	".smp3" => "audio/vnd.sealedmedia.softseal.mpeg",
+	".aif" => "audio/x-aiff",
+	".aifc" => "audio/x-aiff",
+	".aiff" => "audio/x-aiff",
+	".axa" => "audio/x-annodex",
+	".flac" => "audio/x-flac",
+	".mka" => "audio/x-matroska",
+	".669" => "audio/x-mod",
+	".m15" => "audio/x-mod",
+	".med" => "audio/x-mod",
+	".mod" => "audio/x-mod",
+	".mtm" => "audio/x-mod",
+	".ult" => "audio/x-mod",
+	".uni" => "audio/x-mod",
+	".m3u" => "audio/x-mpegurl",
+	".wax" => "audio/x-ms-wax",
+	".wma" => "audio/x-ms-wma",
+	".ram" => "audio/x-pn-realaudio",
+	".rm" => "audio/x-pn-realaudio",
+	".ra" => "audio/x-realaudio",
+	".s3m" => "audio/x-s3m",
+	".stm" => "audio/x-stm",
+	".wav" => "audio/x-wav",
+	".xyz" => "chemical/x-xyz",
+	".ttc" => "font/collection",
+	".otf" => "font/otf",
+	".ttf" => "font/ttf",
+	".woff" => "font/woff",
+	".woff2" => "font/woff2",
+	".exr" => "image/aces",
+	".avci" => "image/avci",
+	".avcs" => "image/avcs",
+	".avif" => "image/avif",
+	".hif" => "image/avif",
+	".bmp" => "image/bmp",
+	".dib" => "image/bmp",
+	".cgm" => "image/cgm",
+	".drle" => "image/dicom-rle",
+	".emf" => "image/emf",
+	".fit" => "image/fits",
+	".fits" => "image/fits",
+	".fts" => "image/fits",
+	".gif" => "image/gif",
+	".heic" => "image/heic",
+	".heics" => "image/heic-sequence",
+	".heif" => "image/heif",
+	".heifs" => "image/heif-sequence",
+	".hej2" => "image/hej2k",
+	".hsj2" => "image/hsj2",
+	".ief" => "image/ief",
+	".jls" => "image/jls",
+	".jp2" => "image/jp2",
+	".jpg2" => "image/jp2",
+	".jfif" => "image/jpeg",
+	".jpe" => "image/jpeg",
+	".jpeg" => "image/jpeg",
+	".jpg" => "image/jpeg",
+	".jph" => "image/jph",
+	".jhc" => "image/jphc",
+	".jpgm" => "image/jpm",
+	".jpm" => "image/jpm",
+	".jpf" => "image/jpx",
+	".jpx" => "image/jpx",
+	".jxl" => "image/jxl",
+	".jxr" => "image/jxr",
+	".jxra" => "image/jxrA",
+	".jxrs" => "image/jxrS",
+	".jxs" => "image/jxs",
+	".jxsc" => "image/jxsc",
+	".jxsi" => "image/jxsi",
+	".jxss" => "image/jxss",
+	".ktx" => "image/ktx",
+	".ktx2" => "image/ktx2",
+	".png" => "image/png",
+	".btf" => "image/prs.btif",
+	".btif" => "image/prs.btif",
+	".pti" => "image/prs.pti",
+	".svg" => "image/svg+xml",
+	".svgz" => "image/svg+xml",
+	".t38" => "image/t38",
+	".tif" => "image/tiff",
+	".tiff" => "image/tiff",
+	".tfx" => "image/tiff-fx",
+	".webp" => "image/webp",
+	".wmf" => "image/wmf",
+	".psd" => "image/vnd.adobe.photoshop",
+	".azv" => "image/vnd.airzip.accelerator.azv",
+	".uvg" => "image/vnd.dece.graphic",
+	".uvi" => "image/vnd.dece.graphic",
+	".uvvg" => "image/vnd.dece.graphic",
+	".uvvi" => "image/vnd.dece.graphic",
+	".djv" => "image/vnd.djvu",
+	".djvu" => "image/vnd.djvu",
+	".dwg" => "image/vnd.dwg",
+	".dxf" => "image/vnd.dxf",
+	".fbs" => "image/vnd.fastbidsheet",
+	".fpx" => "image/vnd.fpx",
+	".fst" => "image/vnd.fst",
+	".mmr" => "image/vnd.fujixerox.edmics-mmr",
+	".rlc" => "image/vnd.fujixerox.edmics-rlc",
+	".pgb" => "image/vnd.globalgraphics.pgb",
+	".ico" => "image/vnd.microsoft.icon",
+	".apng" => "image/vnd.mozilla.apng",
+	".mdi" => "image/vnd.ms-modi",
+	".b16" => "image/vnd.pco.b16",
+	".hdr" => "image/vnd.radiance",
+	".rgbe" => "image/vnd.radiance",
+	".xyze" => "image/vnd.radiance",
+	".s1n" => "image/vnd.sealed.png",
+	".spn" => "image/vnd.sealed.png",
+	".spng" => "image/vnd.sealed.png",
+	".s1g" => "image/vnd.sealedmedia.softseal.gif",
+	".sgi" => "image/vnd.sealedmedia.softseal.gif",
+	".sgif" => "image/vnd.sealedmedia.softseal.gif",
+	".s1j" => "image/vnd.sealedmedia.softseal.jpg",
+	".sjp" => "image/vnd.sealedmedia.softseal.jpg",
+	".sjpg" => "image/vnd.sealedmedia.softseal.jpg",
+	".tap" => "image/vnd.tencent.tap",
+	".vtf" => "image/vnd.valve.source.texture",
+	".wbmp" => "image/vnd.wap.wbmp",
+	".xif" => "image/vnd.xiff",
+	".pcx" => "image/vnd.zbrush.pcx",
+	".ras" => "image/x-cmu-raster",
+	".pnm" => "image/x-portable-anymap",
+	".pbm" => "image/x-portable-bitmap",
+	".pgm" => "image/x-portable-graymap",
+	".ppm" => "image/x-portable-pixmap",
+	".rgb" => "image/x-rgb",
+	".tga" => "image/x-targa",
+	".xbm" => "image/x-xbitmap",
+	".xpm" => "image/x-xpixmap",
+	".xwd" => "image/x-xwindowdump",
+	".u8msg" => "message/global",
+	".u8dsn" => "message/global-delivery-status",
+	".u8mdn" => "message/global-disposition-notification",
+	".u8hdr" => "message/global-headers",
+	".art" => "message/rfc822",
+	".eml" => "message/rfc822",
+	".mail" => "message/rfc822",
+	".gltf" => "model/gltf+json",
+	".glb" => "model/gltf-binary",
+	".iges" => "model/iges",
+	".igs" => "model/iges",
+	".mesh" => "model/mesh",
+	".msh" => "model/mesh",
+	".silo" => "model/mesh",
+	".mtl" => "model/mtl",
+	".obj" => "model/obj",
+	".stl" => "model/stl",
+	".vrml" => "model/vrml",
+	".wrl" => "model/vrml",
+	".x3db" => "model/x3d+xml",
+	".x3dv" => "model/x3d-vrml",
+	".x3dvz" => "model/x3d-vrml",
+	".dae" => "model/vnd.collada+xml",
+	".dwf" => "model/vnd.dwf",
+	".dor" => "model/vnd.gdl",
+	".gdl" => "model/vnd.gdl",
+	".gsm" => "model/vnd.gdl",
+	".ism" => "model/vnd.gdl",
+	".lmp" => "model/vnd.gdl",
+	".msm" => "model/vnd.gdl",
+	".rsm" => "model/vnd.gdl",
+	".win" => "model/vnd.gdl",
+	".gtw" => "model/vnd.gtw",
+	".moml" => "model/vnd.moml+xml",
+	".mts" => "model/vnd.mts",
+	".ogex" => "model/vnd.opengex",
+	".pyo" => "model/vnd.pytha.pyox",
+	".pyox" => "model/vnd.pytha.pyox",
+	".vds" => "model/vnd.sap.vds",
+	".usdz" => "model/vnd.usdz+zip",
+	".bsp" => "model/vnd.valve.source.compiled-map",
+	".vtu" => "model/vnd.vtu",
+	".vpm" => "multipart/voice-message",
+	".bmed" => "multipart/vnd.bint.med-plus",
+	".sgm" => "text/SGML",
+	".sgml" => "text/SGML",
+	".appcache" => "text/cache-manifest",
+	".manifest" => "text/cache-manifest",
+	".ics" => "text/calendar",
+	".ifb" => "text/calendar",
+	".CQL" => "text/cql",
+	".css" => "text/css;charset=utf-8",
+	".csv" => "text/csv;charset=utf-8",
+	".csvs" => "text/csv-schema",
+	".soa" => "text/dns",
+	".zone" => "text/dns",
+	".gff3" => "text/gff3",
+	".htm" => "text/html",
+	".html" => "text/html",
+	".sandboxed" => "text/html-sandboxed",
+	".js" => "text/javascript",
+	".mjs" => "text/javascript",
+	".cnd" => "text/jcr-cnd",
+	".markdown" => "text/markdown;charset=utf-8",
+	".md" => "text/markdown;charset=utf-8",
+	".miz" => "text/mizar",
+	".n3" => "text/n3",
+	".asc" => "text/plain;charset=utf-8",
+	".c" => "text/plain;charset=utf-8",
+	".cc" => "text/plain;charset=utf-8",
+	".conf" => "text/plain;charset=utf-8",
+	".cxx" => "text/plain;charset=utf-8",
+	".el" => "text/plain;charset=utf-8",
+	".f90" => "text/plain;charset=utf-8",
+	".h" => "text/plain;charset=utf-8",
+	".hh" => "text/plain;charset=utf-8",
+	".hxx" => "text/plain;charset=utf-8",
+	".log" => "text/plain;charset=utf-8",
+	".pm" => "text/plain;charset=utf-8",
+	".spec" => "text/plain;charset=utf-8",
+	".text" => "text/plain;charset=utf-8",
+	".txt" => "text/plain;charset=utf-8",
+	".provn" => "text/provenance-notation",
+	".rst" => "text/prs.fallenstein.rst",
+	".dsc" => "text/prs.lines.tag",
+	".tag" => "text/prs.lines.tag",
+	".rtx" => "text/richtext",
+	".shaclc" => "text/shaclc",
+	".shc" => "text/shaclc",
+	".spdx" => "text/spdx",
+	".tsv" => "text/tab-separated-values",
+	".roff" => "text/troff",
+	".t" => "text/troff",
+	".tr" => "text/troff",
+	".ttl" => "text/turtle",
+	".uri" => "text/uri-list",
+	".uris" => "text/uri-list",
+	".vcard" => "text/vcard",
+	".vcf" => "text/vcard",
+	".vtt" => "text/vtt",
+	".rng" => "text/xml",
+	".xml" => "text/xml",
+	".xsd" => "text/xml",
+	".ent" => "text/xml-external-parsed-entity",
+	".dms" => "text/vnd.DMClientScript",
+	".a" => "text/vnd.a",
+	".abc" => "text/vnd.abc",
+	".ascii" => "text/vnd.ascii-art",
+	".copyright" => "text/vnd.debian.copyright",
+	".sub" => "text/vnd.dvb.subtitle",
+	".jtd" => "text/vnd.esmertec.theme-descriptor",
+	".flt" => "text/vnd.ficlab.flt",
+	".fly" => "text/vnd.fly",
+	".flx" => "text/vnd.fmi.flexstor",
+	".dot" => "text/vnd.graphviz",
+	".gv" => "text/vnd.graphviz",
+	".hans" => "text/vnd.hans",
+	".hgl" => "text/vnd.hgl",
+	".3dm" => "text/vnd.in3d.3dml",
+	".3dml" => "text/vnd.in3d.3dml",
+	".spo" => "text/vnd.in3d.spot",
+	".spot" => "text/vnd.in3d.spot",
+	".mpf" => "text/vnd.ms-mediapackage",
+	".ccc" => "text/vnd.net2phone.commcenter.command",
+	".mc2" => "text/vnd.senx.warpscript",
+	".uric" => "text/vnd.si.uricatalogue",
+	".sos" => "text/vnd.sosi",
+	".jad" => "text/vnd.sun.j2me.app-descriptor",
+	".ts" => "text/vnd.trolltech.linguist",
+	".si" => "text/vnd.wap.si",
+	".sl" => "text/vnd.wap.sl",
+	".wml" => "text/vnd.wap.wml",
+	".wmls" => "text/vnd.wap.wmlscript",
+	".pod" => "text/x-pod",
+	".etx" => "text/x-setext",
+	".3gp" => "video/3gpp",
+	".3gpp" => "video/3gpp",
+	".3g2" => "video/3gpp2",
+	".3gpp2" => "video/3gpp2",
+	".m4s" => "video/iso.segment",
+	".mj2" => "video/mj2",
+	".mjp2" => "video/mj2",
+	".m4v" => "video/mp4",
+	".mp4" => "video/mp4",
+	".mpg4" => "video/mp4",
+	".m1v" => "video/mpeg",
+	".m2v" => "video/mpeg",
+	".mpe" => "video/mpeg",
+	".mpeg" => "video/mpeg",
+	".mpg" => "video/mpeg",
+	".ogv" => "video/ogg",
+	".mov" => "video/quicktime",
+	".qt" => "video/quicktime",
+	".webm" => "video/webm",
+	".uvh" => "video/vnd.dece.hd",
+	".uvvh" => "video/vnd.dece.hd",
+	".uvm" => "video/vnd.dece.mobile",
+	".uvvm" => "video/vnd.dece.mobile",
+	".uvu" => "video/vnd.dece.mp4",
+	".uvvu" => "video/vnd.dece.mp4",
+	".uvp" => "video/vnd.dece.pd",
+	".uvvp" => "video/vnd.dece.pd",
+	".uvs" => "video/vnd.dece.sd",
+	".uvvs" => "video/vnd.dece.sd",
+	".uvv" => "video/vnd.dece.video",
+	".uvvv" => "video/vnd.dece.video",
+	".dvb" => "video/vnd.dvb.file",
+	".fvt" => "video/vnd.fvt",
+	".m4u" => "video/vnd.mpegurl",
+	".mxu" => "video/vnd.mpegurl",
+	".pyv" => "video/vnd.ms-playready.media.pyv",
+	".nim" => "video/vnd.nokia.interleaved-multimedia",
+	".bik" => "video/vnd.radgamettools.bink",
+	".bk2" => "video/vnd.radgamettools.bink",
+	".smk" => "video/vnd.radgamettools.smacker",
+	".s11" => "video/vnd.sealed.mpeg1",
+	".smpg" => "video/vnd.sealed.mpeg1",
+	".s14" => "video/vnd.sealed.mpeg4",
+	".ssw" => "video/vnd.sealed.swf",
+	".sswf" => "video/vnd.sealed.swf",
+	".s1q" => "video/vnd.sealedmedia.softseal.mov",
+	".smo" => "video/vnd.sealedmedia.softseal.mov",
+	".smov" => "video/vnd.sealedmedia.softseal.mov",
+	".viv" => "video/vnd.vivo",
+	".yt" => "video/vnd.youtube.yt",
+	".axv" => "video/x-annodex",
+	".flv" => "video/x-flv",
+	".fxm" => "video/x-javafx",
+	".mkv" => "video/x-matroska",
+	".mk3d" => "video/x-matroska-3d",
+	".asx" => "video/x-ms-asf",
+	".wm" => "video/x-ms-wm",
+	".wmv" => "video/x-ms-wmv",
+	".wmx" => "video/x-ms-wmx",
+	".wvx" => "video/x-ms-wvx",
+	".avi" => "video/x-msvideo",
+	".movie" => "video/x-sgi-movie",
+	".ice" => "x-conference/x-cooltalk",
+	".sisx" => "x-epoc/x-sisx-app",
+	"README" => "text/plain;charset=utf-8",
+	"Makefile" => "text/x-makefile;charset=utf-8",
+
+	# enable caching for unknown mime types:
+	"" => "application/octet-stream"
+)
diff --git a/server/modules.conf b/server/modules.conf
new file mode 100644
index 0000000..e25538c
--- /dev/null
+++ b/server/modules.conf
@@ -0,0 +1,9 @@
+server.modules = (
+#  "mod_rewrite",
+  "mod_access",
+#  "mod_auth",
+#  "mod_authn_file",
+#  "mod_redirect",
+#  "mod_setenv",
+#  "mod_alias",
+)
diff --git a/site/DejaVuSans.woff2 b/site/DejaVuSans.woff2
new file mode 100644
index 0000000..8437d4e
--- /dev/null
+++ b/site/DejaVuSans.woff2
diff --git a/site/css/math.css b/site/css/math.css
new file mode 100644
index 0000000..d111d1f
--- /dev/null
+++ b/site/css/math.css
@@ -0,0 +1,41 @@
+/*
+p.author
+p.date
+p.creator
+.title
+.subtitle
+.todo
+.done
+.WAITING
+.timestamp
+.timestamp-kwd
+.timestamp-wrapper
+.tag
+._HOME
+.target
+.linenr
+.code-highlighted
+div.outline-N
+div.outline-text-N
+.section-number-N
+.figure-number
+.table-number
+.listing-number
+div.figure
+pre.src
+pre.example
+p.verse
+div.footnotes
+p.footnote
+.footref
+.footnum
+.org-svg
+*/
+
+/*
+html {
+    height: 100%;
+     color: #cccccc;
+    background-color: hsl(240, 30%, 50%);
+}
+*/
diff --git a/site/css/style.css b/site/css/style.css
new file mode 100644
index 0000000..c8e04e0
--- /dev/null
+++ b/site/css/style.css
@@ -0,0 +1,166 @@
+@font-face {
+    font-family: "DejaVuSans";
+    src: url(/DejaVuSans.woff2) format("woff2");
+}
+
+/* Main layout of the page */
+
+html {
+    height: 100%;
+    background-color: hsl(240, 30%, 50%);
+    font-family: "DejaVuSans";
+}
+
+body {
+    margin: auto;
+    max-width: 25cm;
+    min-height: 100%;
+    display: flex;
+    flex-direction: column;
+}
+
+body, header {
+    background-color: hsl(240, 30%, 80%);
+}
+
+header {
+    text-align: center;
+}
+
+header > * {
+    margin: 0.5rem auto;
+}
+
+nav {
+    background-color: hsl(240, 30%, 20%);
+}
+
+nav > ul {
+    display: flex;
+    padding: 0;
+    margin: 0 auto;
+}
+
+nav li {
+    display: block;
+    list-style: none;
+}
+
+nav li:hover {
+    background-color: hsl(240, 30%, 30%);
+}
+
+nav > ul > li:last-child {
+    margin-left: auto;
+}
+
+nav a {
+    text-decoration: none;
+    color: #dddddd;
+    display: block;
+    line-height: 2em;
+    height: 2em;
+    padding: 0 1em;
+}
+
+main {
+    padding: 2em;
+    flex-grow: 1;
+}
+
+footer {
+    padding: 1em 2em;
+}
+
+/* Other elements */
+
+h1, h2, h3, h4, h5, h6 {
+    text-align: center;
+}
+
+hr {
+    margin: 0;
+    margin-top: auto;
+}
+
+figure {
+    text-align: center;
+}
+
+figure img {
+    /* max-width: 30em; */
+    max-width: 100%;
+    object-fit: contain;
+    display: block;
+    margin-left: auto;
+    margin-right: auto;
+}
+
+figcaption {
+    margin-top: 1em;
+}
+
+.equation-container {
+    display: block;
+    padding: 1em 2em;
+    overflow: auto;
+}
+
+.equation-container img {
+    object-fit: contain;
+    display: block;
+    margin: auto;
+}
+
+pre, figure, .equation-container {
+    margin: 1rem;
+    padding: 1rem;
+    box-sizing: border-box;
+    background-color: hsl(240, 30%, 90%);
+    border: 1px solid hsl(240, 60%, 50%);
+    overflow: scroll;
+
+}
+
+/* Inline math */
+p > .org-svg {
+    max-height: 1rem;
+    display: inline-block;
+}
+
+.article-date {
+    margin-left: auto;
+}
+
+.link-like, a {
+    color: #111111;
+    text-decoration: underline;
+}
+
+/* Source code */
+.src-common-lisp .org-keyword {
+    color: #3a81c3;
+    font-weight: bold;
+}
+
+.src-common-lisp .org-builtin {
+    color: #3a81c3;
+}
+
+.src-common-lisp .org-function-name {
+    color: #6c3163;
+    font-weight: bold;
+}
+
+.src-common-lisp .org-doc {
+    color: #da8b55;
+}
+
+.src-common-lisp .org-comment {
+    color: #2aa1ae;
+}
+
+/* NOTE: orgmode uses `code` only for inline code  */
+code {
+    background-color: hsl(240, 40%, 90%);
+}
diff --git a/site/img/programmer_side.png b/site/img/programmer_side.png
new file mode 100644
index 0000000..a3f4baa
--- /dev/null
+++ b/site/img/programmer_side.png
diff --git a/site/img/programmer_top.png b/site/img/programmer_top.png
new file mode 100644
index 0000000..827464e
--- /dev/null
+++ b/site/img/programmer_top.png
diff --git a/site/img/prototype1.jpg b/site/img/prototype1.jpg
new file mode 100644
index 0000000..33ac569
--- /dev/null
+++ b/site/img/prototype1.jpg
diff --git a/site/img/prototype2_1.jpg b/site/img/prototype2_1.jpg
new file mode 100644
index 0000000..64d0786
--- /dev/null
+++ b/site/img/prototype2_1.jpg
diff --git a/site/img/prototype2_2.jpg b/site/img/prototype2_2.jpg
new file mode 100644
index 0000000..349c04b
--- /dev/null
+++ b/site/img/prototype2_2.jpg
diff --git a/site/robots.txt b/site/robots.txt
new file mode 100644
index 0000000..b463ba6
--- /dev/null
+++ b/site/robots.txt
@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /privacy.html
diff --git a/site/sitemap b/site/sitemap
new file mode 100644
index 0000000..33c5925
--- /dev/null
+++ b/site/sitemap
@@ -0,0 +1,26 @@
+https://thomaslabs.org/privacy.html
+https://thomaslabs.org/index.html
+https://thomaslabs.org/arm/adventures.html
+https://thomaslabs.org/programs/index.html
+https://thomaslabs.org/z80/index.html
+https://thomaslabs.org/z80/prototype1.html
+https://thomaslabs.org/z80/spi.html
+https://thomaslabs.org/z80/prototype2.html
+https://thomaslabs.org/z80/plm.html
+https://thomaslabs.org/math/spherical-harmonics.html
+https://thomaslabs.org/math/laplace.html
+https://thomaslabs.org/math/diff.html
+https://thomaslabs.org/math/variation.html
+https://thomaslabs.org/math/lagrange.html
+https://thomaslabs.org/math/derivatives.html
+https://thomaslabs.org/math/cylindrical_coordinates.html
+https://thomaslabs.org/math/polar_coordinates.html
+https://thomaslabs.org/math/vectors.html
+https://thomaslabs.org/math/matrices.html
+https://thomaslabs.org/math/integrals.html
+https://thomaslabs.org/math/levi_cevita.html
+https://thomaslabs.org/math/index.html
+https://thomaslabs.org/math/spherical_coordinates.html
+https://thomaslabs.org/math/orbit.html
+https://thomaslabs.org/math/trigonometry.html
+https://thomaslabs.org/math/fft.html
diff --git a/site/thomas.pub b/site/thomas.pub
new file mode 100644
index 0000000..87b380f
--- /dev/null
+++ b/site/thomas.pub
@@ -0,0 +1 @@
+ssh-rsa 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 thomas@alpha
diff --git a/src/abgabe.org b/src/abgabe.org
deleted file mode 100644
index 772d04d..0000000
--- a/src/abgabe.org
+++ /dev/null
@@ -1,101 +0,0 @@
-#+TITLE: Übungsblatt 5 - Aufgabe 3
-#+HTML_HEAD_EXTRA: <meta name="robots" content="noindex">
-#+SETUPFILE: ../options.org
-
-[[https://thomaslabs.org/shortcoil.m][Quellcode herunterladen]]
-
-* Ergebnisse des Programms
-[[https://thomaslabs.org/media/betrag.png]]
-
-[[https://thomaslabs.org/media/richtung.png]]
-
-[[https://thomaslabs.org/media/spulenachse.png]]
-* Octave / Matlab Quellcode
-#+BEGIN_SRC octave
-  clear all;
-  close all;
-  clc;
-
-  %% length of the observed region in m
-  len = 40e-3; %m
-  len = len / 2; %we shall go from -len to +len
-  %% number of points in x- and z-direction
-  N_space = 50;
-  %% number of points for integration along coil
-  N_phi = 250;
-  %% radius
-  R = 5e-3; %m
-  %% length
-  L = 23e-3; %m
-  %% number of windings
-  N = 5;
-  %% current
-  I = 8; %A
-  %% vacuumpermeability
-  mu0 = 4 * pi * 1e-7; %Vs/Am
-
-  %% define grid
-  z = linspace(-len, len, N_space); %m
-  x = linspace(-len, len, N_space); %m
-
-  %% parameter of coil-wire-path-paramtrisation
-  phi = linspace(0, N * 2 * pi, N_phi);
-  dphi = phi(2) - phi(1);
-
-  %% Precalculate cos and sin
-  p_sin = sin(phi);
-  p_cos = cos(phi);
-
-  %% loop through all x-z-points
-  for iz = 1 : N_space
-    for ix = 1 : N_space
-      %% r of this x-z-point
-      r = [x(ix); 0; z(iz)];
-      B = [0; 0; 0];
-
-      %% Riemann sum along the coil
-      for ip = 1 : N_phi
-        %% Point along the coil
-        l = [R * p_cos(ip); R * p_sin(ip); ip * L / N_phi - L / 2];
-        %% Vector tangent to the coil of length dl = R * dphi
-        dl = [- R * p_sin(ip); R * p_cos(ip); L / 2 / N / pi];
-        dl = (R * dphi / norm(dl)) * dl;
-        %% Vector from the coil to the x-z-point
-        rp = r - l;
-        %% Add dB
-        B = B + (mu0 / 4 / pi) * I * (1 / norm(rp) ^ 3) * cross(dl, rp);
-      end
-
-      B_X(iz, ix) = B(1);
-      B_Y(iz, ix) = B(2);
-      B_Z(iz, ix) = B(3);
-    end
-  end
-
-  figure('Name', 'Richtung der Flußdichte', 'NumberTitle', 'off');
-  quiver(x * 1e3, z * 1e3, B_X ./ sqrt(B_X .^ 2 + B_Z .^ 2),
-         B_Z ./ sqrt(B_X .^ 2 + B_Z .^ 2));
-  title('Richtung der Flußdichte')
-  xlabel('x [mm]')
-  ylabel('z [mm]')
-  axis image
-  saveas(gca, 'richtung.png')
-
-  betrag = sqrt(B_X .^ 2 + B_Y .^ 2 + B_Z .^ 2)
-  figure('Name', 'Betrag der Flußdichte', 'NumberTitle', 'off');
-  imagesc(x * 1e3, z * 1e3, betrag);
-  title('Betrag der Flußdichte');
-  xlabel('x [mm]')
-  ylabel('z [mm]')
-  colormap(gray);
-  colorbar('title', 'B [T]');
-  saveas(gca, 'betrag.png')
-
-  figure('Name', 'Flußdichte entlang Spulenachse', 'NumberTitle', 'off');
-  B_2 = B_Z(:, round((N_space - 1) / 2));
-  plot(x * 1e3, B_2);
-  title('Flußdichte entlang Spulenachse');
-  xlabel('z [mm]');
-  ylabel('Flußdichte [T]');
-  saveas(gca, 'spulenachse.png')
-#+END_SRC
diff --git a/src/arm/adventures.org b/src/arm/adventures.org
new file mode 100644
index 0000000..8712435
--- /dev/null
+++ b/src/arm/adventures.org
@@ -0,0 +1,58 @@
+#+title: New adventures in ARM
+#+author: Thomas Albers Raviola
+#+date: 2022-10-10
+
+* Backgroud
+If you have read my poorly written articles about my Z80 computers, it is
+probably no surprise that I ended up playing with ARM processors.
+
+Way back I bought a Beaglebone Black based on the Sitara AM335x series of armhf
+processors. I never really gave it much use as I got more interested in Z80 and
+the idea of myself building and soldering my own computer.
+
+This changed some weeks ago, when while enjoying the free time between semesters
+at university I decided to buy a Pinenote from Pine64. I had seen before the
+E-Ink tablet of one of my tutors and wanted to replace taking notes on paper for
+some kind of digital form. Initially I used my X200T laptop for this end but the
+battery life does leave some performance to wish for.
+
+The alternatives I found in the market shared all the same disadvantages. For
+example, the reMarkable tablet of my Tutor seems to work in some kind of
+restricted ecosystem with cloud syncing bullshit I don't care about.
+
+If I am not able to run the software I want, I don't care about the product.
+
+The Pinenote on the other hand, while still in development and with basically no
+finished software ready, is designed to leave complete freedom to the user.
+
+My plan was to experiment with my Beaglebone, learning to compile a kernel and a
+GNU/Linux distro for ARM and then apply this knowledge to port some system to
+the Pinenote.
+
+This however was not at all necessary, as there are already people who have
+reverse engineered the DRM driver for the display and documented how to comile a
+custom kernel to run on the ARM processor of the Pinenote. This process ended up
+being actually really easy.
+
+I won't claim to be able to explain it better. Nonetheless I have documented (or
+will) the process as part of this series of articles about my experiments with
+low-level ARM hacking.
+
+This topic evolved rapidly into an extremly deep rabbit hole. As I still plan to
+learn how the boot process for ARM devices work by writing a bare-bones blink
+LED code, the Hello World! of low-level programming, for my Beaglebone. I plan
+this to be the continuation of me learning low-level stuff as with my Z80.
+
+I also discovered that the ebook reader I had and that now is left redundant by
+my Pinenote also has an ARM processor (I know, not a big surprise). But instead
+of writing the system to a eMMC, tolino packed a SD card with the system,
+rendering the process of testing other code a trivial one.
+
+Given my despise for Android and how satisfied I am with my Pinenote, I actually
+decided to buy the Pinephone Pro and the Pinebook Pro. When the time comes, I
+would like to also write articles on how I port my favourite GNU/Linux distro,
+GNU/Guix, to these platforms. Hopefully I won't need to use a damn Android
+device ever again and will actually be able to use my devices the way I want.
+
+Ranting aside, I now invite you to check the writings about the findings in my
+new adventures in the ARM world.
diff --git a/math/cylindrical_coordinates.org b/src/math/cylindrical_coordinates.org
index fab185b..bfb6d57 100644
--- a/math/cylindrical_coordinates.org
+++ b/src/math/cylindrical_coordinates.org
@@ -1,14 +1,11 @@
-#+TITLE:Cylindrical Coordinates
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}#1}{\text{d}#2}}
-#+LATEX_HEADER: \newcommand{\unitv}[1]{\bm{\hat{e}}_#1}
+#+title:Cylindrical Coordinates
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Coordinate transformations
 \begin{align*}
 x &= r \cos\varphi\\
@@ -22,6 +19,7 @@ z &= z
 \unitv{\theta} &= -\sin\theta \unitv{x} + \cos\theta \unitv{y}\\
 \unitv{z} &= \unitv{z}
 \end{align*}
+
 * Kinematic in cylindrical coordinates
 ** Time derivatives of the local unit vectors
 \begin{align*}
@@ -29,6 +27,7 @@ z &= z
 \deriv{\unitv{\theta}}{t} &= -\dot{\theta}\unitv{r}\\
 \deriv{\unitv{z}}{t} &= 0
 \end{align*}
+
 ** Position vector and its time derivatives
 \begin{align*}
 \bm{r} &= r\unitv{r} + z\unitv{z}\\
diff --git a/math/derivatives.org b/src/math/derivatives.org
index 4d5d4be..b9d431d 100644
--- a/math/derivatives.org
+++ b/src/math/derivatives.org
@@ -1,10 +1,5 @@
-#+TITLE:Table of Derivatives
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \newcommand{\dcoff}[1]{\frac{\text{d}}{\text{d}x} #1}
-#+LATEX_HEADER: \newcommand{\sdcoff}[1]{\frac{\text{d}#1}{\text{d}x}}
-#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}}{\text{d}x} #1 &= #2}
+#+title:Table of Derivatives
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
@@ -22,10 +17,10 @@ Let $f$ and $g$ be real valued functions and $c$ some real constant:
 
 * Trigonometric Funtions
 \begin{align*}
-\deriv{\sin(x)}{\cos(x)}\\
-\deriv{\cos(x)}{-\sin(x)}\\
-\deriv{\tan(x)}{\sec^2(x)}\\
-\deriv{\sec(x)}{\sec(x)\tan(x)}\\
-\deriv{\csc(x)}{\csc(x)\cot(x)}\\
-\deriv{\csc(x)}{-\csc^2(x)}
+\ddx{\sin(x)} &= \cos(x)\\
+\ddx{\cos(x)} &= -\sin(x)\\
+\ddx{\tan(x)} &= \sec^2(x)\\
+\ddx{\sec(x)} &= \sec(x)\tan(x)\\
+\ddx{\csc(x)} &= \csc(x)\cot(x)\\
+\ddx{\csc(x)} &= -\csc^2(x)
 \end{align*}
diff --git a/src/math/diff.org b/src/math/diff.org
new file mode 100644
index 0000000..bbb8fa6
--- /dev/null
+++ b/src/math/diff.org
@@ -0,0 +1,100 @@
+#+title: Method for solving first order and Bernoulli's differential equations
+#+author: Thomas Albers Raviola
+#+date: 2022-10-01
+#+setupfile: ../../math_options.org
+
+* Disclaimer
+This site as of now just a technology demonstration and its claims
+should not be taken as true (even though I myself am pretty confident
+they are)
+
+* History
+I came across the method concerning this article in an old math book from Doctor
+Granville (Elements of differential and integral calculus - ISBN-13:
+978-968-18-1178-5). It doesn't appear to be a popular technique as when using it
+for my assignments I always had to explain what I was doing. As of yet, I still
+haven't found another text referencing it, which is why I decided to include it
+in my website.
+
+In the original book this procedure is shown but never really explained, it is
+left as a sort of "it just works" thing. Here is my attempt to it clear.
+
+* Theory
+Throughout this article we'll consider first order differential equations with
+function coefficients just as a special case of the Bernoulli's differential
+equation with $n = 0$.
+
+Consider now the following ODE:
+\begin{equation*}
+y' + P(x)y = Q(x)y^n
+\end{equation*}
+
+let $y$ be the product of two arbitrary functions $w$ and $z$ such that
+
+\begin{align*}
+y &= wz \\
+y' &= w'z + wz'
+\end{align*}
+
+we now restrict $z$ to be the solution of the ODE
+
+\begin{equation*}
+z' + P(x)z = 0
+\end{equation*}
+
+with this it is possible to solve for $z$ by integrating
+
+\begin{equation*}
+\frac{z'}{z} = - P(x) \\
+\end{equation*}
+
+using $z$ we solve for $w$ by replacing $y$ inside the original ODE
+
+\begin{align*}
+w'z + wz' + P(x)wz &= Q(x)w^nz^n \\
+w'z + w\left(z' + P(x)z\right) &= Q(x)w^nz^n \\
+w'z &= Q(x)w^nz^n \\
+\frac{w'}{w^n} &= Q(x)z^{n-1} \\
+\end{align*}
+
+the general solution to our original ODE can be simply obtained by multiplying
+$w$ and $z$.
+
+* Comments
+This method, while functional, may not always be the most practical. In some
+cases the differential equations for $w$ and $z$ may not have closed algebraic
+solutions. A more traditional substitution may in some situations also be easier
+than this method. Like always it is up to one to know which tool to apply for a
+given problem.
+
+* Example
+Let's solve an example to show the method in practice
+
+\begin{align*}
+y' - 3x^2y &= -x^2y^3 \\
+w'z + wz' - 3x^2wz &= -x^2w^3z^3 \\
+w'z + w\left(z' - 3x^2z\right) &= -x^2w^3z^3
+\end{align*}
+
+solve now for $z$
+
+\begin{align*}
+z' - 3x^2z &= 0 \\
+\frac{z'}{z} &= 3x^2 \\
+z &= c e^{x^3}
+\end{align*}
+
+replace $z$ in the equation
+
+\begin{align*}
+w' &= -x^2w^3z^2 \\
+- \frac{w'}{w^3} &= c^2 e^(2x^3)x^2 \\
+\frac{1}{2 w^2} &= c^2\left(\frac{e^{2x^3}}{6} + k\right) \\
+w &= \pm \frac{1}{c} \sqrt{\frac{3}{e^{2x^3} + k}}
+\end{align*}
+
+finally with $w$ and $z$ get $y$
+
+\begin{equation*}
+y = \pm e^{x^3} \sqrt{\frac{3}{e^{2x^3} + k}}
+\end{equation*}
diff --git a/src/math/fft.org b/src/math/fft.org
new file mode 100644
index 0000000..45e9595
--- /dev/null
+++ b/src/math/fft.org
@@ -0,0 +1,141 @@
+#+title: Fast Fourier Transform
+#+subtitle: Implementation in Common Lisp
+#+author: Thomas Albers Raviola
+#+date: <2023-03-06>
+#+setupfile: ../../math_options.org
+
+In this article I attept to explain the principles of the fast fourier transform
+(FFT) and develop in incremental steps an implementation in common lisp.
+
+*NOTE*: This is part of my personal notes and as such may contain mistakes or
+not be correct at all. If you find any issues please contact me at my email
+address.
+
+* Introduction
+
+The FFT is an algorithm for computing the discrete fourier transform (DFT) of an
+array of values that is meant to be faster than the usual naive implementation.
+Instead of having the usual \[ O(n^2) \] behaviour it is an \[ O(n\log(n)) \]
+algorithm.
+
+* Derivation
+
+To derive the FFT we first consider the definition of the DFT
+
+Let \[ \xi_k \] be an array of N, possible complex, numbers. The DFT of \[ \xi_k
+\] is an array of the same length \[ x_k \] defined as:
+
+{{{beg-eqn}}}
+x_k = \sum_{n=0}^{N-1} \xi_n e^{- \frac{2 \pi i}{N} n k}
+{{{end-eqn}}}
+
+A possible implementation of this in code would be something like the following:
+
+#+begin_src common-lisp
+  (defun dft (x)
+    "Naive discrete fourier transform, not fft"
+    (flet ((transform (k)
+             (loop :with i = (complex 0 1)
+                   :for n :below (length x)
+                   :sum (* (aref x n) (exp (- (/ (* 2 pi i k n) (length x))))))))
+      (map-seq-iota #'transform (length x))))
+#+end_src
+
+But we can do a lot better in terms of performance. To this end we first split
+the sum {{{ref}}} into even and odd members
+
+{{{beg-align}}}
+x_k &= \sum_{n=0}^{N/2-1} \xi_{2n} e^{- \frac{2 \pi i}{N} (2n) k} +
+\sum_{n=0}^{N/2-1} \xi_{2n+1} e^{- \frac{2 \pi i}{N} (2n+1) k}\\
+&= \sum_{n=0}^{N/2-1} \xi_{2n} e^{- \frac{2 \pi i}{N/2} n k} +
+e^{-\frac{2 \pi i}{N}k} \sum_{n=0}^{N/2-1} \xi_{2n+1} e^{- \frac{2 \pi i}{N/2} n
+k}\\
+&=E_k + e^{-\frac{2 \pi i}{N}k} O_k
+{{{end-align}}}
+
+Where \[ E_k \] and \[ O_k \] themselves are FFTs of a smaller array each.
+Furthermore notice how thanks to the cyclic nature of the complex exponential
+function it is possible to half the number of computations:
+
+{{{beg-align}}}
+x_{k+\frac{N}{2}} &= E_{k+\frac{N}{2}} + e^{-\frac{2 \pi i}{N} (k +
+\frac{N}{2})} O_{k+\frac{N}{2}}\\
+&= E_k - e^{-\frac{2 \pi i}{N} k} O_k
+{{{end-align}}}
+
+Thus
+
+{{{beg-eqn}}}
+\begin{aligned}
+x_k &= E_k + e^{-\frac{2 \pi i}{N} k} O_k\\
+x_{k+\frac{N}{2}} &= E_k - e^{-\frac{2 \pi i}{N} k} O_k
+\end{aligned}\,\text{,}\quad k=0,\dots,\frac{N}{2}-1
+{{{end-eqn}}}
+
+* Implementing the FFT
+
+With the reduction identities we derived for the FFT a preliminary
+implementation could be:
+
+#+begin_src common-lisp
+  (defun fft (sequence)
+    (labels
+        ((fft-step (n step offset)
+           (let ((ret (make-array n)))
+             (if (= n 1)
+                 (setf (aref ret 0) (aref sequence offset))
+                 (loop
+                   :with n2 = (/ n 2)
+                   :with ek = (fft-step n2 (* 2 step) offset)
+                   :with ok = (fft-step n2 (* 2 step) (+ offset step))
+                   :for k :below n2
+                   :for c = (exp (- (/ (* 2 pi (complex 0 1) k) n)))
+                   :do
+                      (setf (aref ret k) (+ (aref ek k) (* c (aref ok k)))
+                            (aref ret (+ k n2)) (- (aref ek k) (* c (aref ok k))))))
+             ret)))
+      (fft-step (length sequence) 1 0)))
+#+end_src
+
+The function ~fft-step~ needs to be able to access both even and odd terms, for
+this we use the ~step~ and ~offset~ arguments. ~step~ indicate the distance
+between consecutive elements of the input to the fft. If we wanted to compute
+the FFT of the even terms, this distance would be 2. For the fft inside this
+outer fft of the even entries we also want to split further into even an odd
+members, this ~step~ needs to be 4 and so on. ~offset~ represents how many
+elements must be skipped until the first element of the subarray.
+
+Notice that we are allocating in each step a new array to return. The FFT can
+however be computed with a single array allocation. For that we store the values
+of \[ E_k \] in the first half of the return array and the values of \[ O_k \]
+in the second half. Finally we use the so called "butterfly" operations to
+compute the final result.
+
+#+caption: Diagram of the abstract data flow inside the FFT. Observe how the FFT itself is define recursively halving the number of items in each step
+[[/svg/fft.svg]]
+
+#+begin_src common-lisp
+  (defun fft* (sequence)
+    (let ((result (make-array (length sequence))))
+      (labels ((fft-step (n step offset roffset)
+                 (if (= n 1)
+                     (setf (aref result roffset) (aref sequence offset))
+                     (let ((n2 (/ n 2)))
+                       (fft-step n2 (* 2 step) offset roffset)                 ; e_k
+                       (fft-step n2 (* 2 step) (+ offset step) (+ roffset n2)) ; o_k
+                       (loop :for k :below n2
+                             :for j = (+ roffset k)
+                             :for c = (exp (- (/ (* 2 pi (complex 0d0 1d0) k) n)))
+                             :for ek = (aref result j)
+                             :for ok = (aref result (+ j n2))
+                             :do
+                                (setf (aref result j)        (+ ek (* c ok))
+                                      (aref result (+ j n2)) (- ek (* c ok))))))))
+        (fft-step (length sequence) 1 0 0)
+        result)))
+#+end_src
+
+There are still many optimizations that could be made to speed up our code, like
+twiddle factors, cache optimizations and more. But this goes beyond the scope I
+planned for this article. Many would probably be also beyond the scope of my
+current abilities.
diff --git a/src/math/index.org b/src/math/index.org
new file mode 100644
index 0000000..38e2eaa
--- /dev/null
+++ b/src/math/index.org
@@ -0,0 +1,19 @@
+#+title: Math and Physics articles
+#+setupfile: ../../math_options.org
+
+- [[file:vectors.org][Cross Product]]
+- [[file:cylindrical_coordinates.org][Cylindrical Coordinates]]
+- [[file:fft.org][Fast Fourier Transform]]
+- [[file:lagrange.org][Lagrange Mechanics]]
+- [[file:laplace.org][Laplace Transformations]]
+- [[file:matrices.org][Matrix Properties]]
+- [[file:diff.org][Method for solving first order and Bernoulli's differential equations]]
+- [[file:orbit.org][Orbit]]
+- [[file:polar_coordinates.org][Polar Coordinates]]
+- [[file:spherical-harmonics.org][Solving the laplace equation in Spherical coordinates]]
+- [[file:spherical_coordinates.org][Spherical Coordinates]]
+- [[file:derivatives.org][Table of Derivatives]]
+- [[file:integrals.org][Table of Integrals]]
+- [[file:levi_cevita.org][The Levi Cevita Symbol]]
+- [[file:trigonometry.org][Trigonometric identities]]
+- [[file:variation.org][Variation Calculus]]
\ No newline at end of file
diff --git a/src/math/integrals.org b/src/math/integrals.org
new file mode 100644
index 0000000..a8e9677
--- /dev/null
+++ b/src/math/integrals.org
@@ -0,0 +1,35 @@
+#+title:Table of Integrals
+#+setupfile: ../../math_options.org
+
+* Disclaimer
+This site as of now just a technology demonstration and its claims
+should not be taken as true (even though I myself am pretty confident
+they are)
+
+* $a + bx$
+\begin{align*}
+\intg{(a + bx)^n}{\frac{(a+bx)^{n+1}}{b(n+1)}}\\
+\int\frac{\D{x}}{a + bx} &= \frac{1}{b}\log(a+bx) + C\\
+\int\frac{x\D{x}}{a + bx} &= \frac{1}{b^2}(a + bx - a\log(a+bx)) + C
+\end{align*}
+
+* Trigonometric Funtions
+\begin{align*}
+\intg{\sin(x)}{-\cos(x)}\\
+\intg{\cos(x)}{\sin(x)}\\
+\intg{\tan(x)}{-\ln(\cos(x))}\\
+\intg{\sec(x)}{\ln(\sec(x) + \tan(x))}\\
+\intg{\csc(x)}{-\ln(\csc(x) + \cot(x))}\\
+\intg{\cot(x)}{\ln(\sin(x))}
+\end{align*}
+* Hyperbolic Funtions as results
+\begin{align*}
+\int\frac{\text{d}x}{\sqrt{x^2 + a^2}} &= \arsinh{\frac{x}{a}} + C\\
+\int\frac{\text{d}x}{\sqrt{x^2 - a^2}} &= \arcosh{\frac{x}{a}} + C\\
+\int\frac{\text{d}x}{a^2 - x^2} &= \frac{1}{a}\artanh{\frac{x}{a}} + C\\
+%\int\frac{\text{d}x}{x^2 - a^2} &= -\frac{1}{a}\arcoth{\frac{x}{a}} + C\\
+\int\frac{\text{d}x}{x\sqrt{a^2 - x^2}} &= -\frac{1}{a}\arsech{\frac{x}{a}} + C\\
+\int\frac{\text{d}x}{x\sqrt{x^2 + a^2}} &= -\frac{1}{a}\arcsch{\frac{x}{a}} + C\\
+\intg{\sqrt{x^2+a^2}}{\frac{x}{2}\sqrt{x^2+a^2} + \frac{a^2}{2}\arsinh{\frac{x}{a}}}\\
+\intg{\sqrt{x^2-a^2}}{\frac{x}{2}\sqrt{x^2-a^2} - \frac{a^2}{2}\arcosh{\frac{x}{a}}}
+\end{align*}
diff --git a/src/math/lagrange.org b/src/math/lagrange.org
new file mode 100644
index 0000000..565c7e7
--- /dev/null
+++ b/src/math/lagrange.org
@@ -0,0 +1,23 @@
+#+title:Lagrange Mechanics
+#+author: Thomas Albers Raviola
+#+date: 2022-10-01
+#+setupfile: ../../math_options.org
+
+* Disclaimer
+This site as of now just a technology demonstration and its claims
+should not be taken as true (even though I myself am pretty confident
+they are)
+
+* Eliminating the constraints
+\begin{align*}
+m_i \ddot{x}_i &= F_i + \sum_{n=1}^R \lambda_n \pderiv{g_n}{x_i}\\
+m_i \ddot{x}_i \pderiv{x_i}{q_k} &= F_i \pderiv{x_i}{q_k} + \sum_{n=1}^R \lambda_n \pderiv{g_n}{x_i} \pderiv{x_i}{q_k}\\
+\sum_{i=1}^{3N} m_i \ddot{x}_i \pderiv{x_i}{q_k} &= \sum_{i=1}^{3N}F_i \pderiv{x_i}{q_k} + \sum_{n=1}^R \lambda_n \sum_{i=1}^{3N} \pderiv{g_n}{x_i} \pderiv{x_i}{q_k}\\
+\sum_{i=1}^{3N} m_i \ddot{x}_i \pderiv{x_i}{q_k} &= \sum_{i=1}^{3N}F_i \pderiv{x_i}{q_k} + \sum_{n=1}^R \lambda_n \deriv{g_n}{q_k}\\
+\sum_{i=1}^{3N} m_i \ddot{x}_i \pderiv{x_i}{q_k} &= \sum_{i=1}^{3N}F_i \pderiv{x_i}{q_k}\\
+\deriv{}{t}\pderiv{(T - U)}{\dot{q}_k} - \pderiv{T}{q_k} &= \sum_{i=1}^{3N}F_i \pderiv{x_i}{q_k}\\
+\deriv{}{t}\pderiv{(T - U)}{\dot{q}_k} - \pderiv{T}{q_k} &= - \sum_{i=1}^{3N}\pderiv{U}{x_i} \pderiv{x_i}{q_k}\\
+\deriv{}{t}\pderiv{(T - U)}{\dot{q}_k} - \left(\pderiv{T}{q_k} - \pderiv{U}{q_k}\right) &= 0\\
+\deriv{}{t}\pderiv{(T - U)}{\dot{q}_k} - \pderiv{T - U}{q_k} &= 0\\
+\deriv{}{t}\pderiv{\mathcal{L}}{\dot{q}_k} - \pderiv{\mathcal{L}}{q_k} &= 0
+\end{align*}
diff --git a/src/math/laplace.org b/src/math/laplace.org
new file mode 100644
index 0000000..ea2c638
--- /dev/null
+++ b/src/math/laplace.org
@@ -0,0 +1,39 @@
+#+title:Laplace Transformations
+#+author: Thomas Albers Raviola
+#+date: 2022-10-01
+#+setupfile: ../../math_options.org
+
+\begin{align*}
+\delta(t) & 1\\
+\delta(t - a) & e^{as}\\
+1 & \frac{1}{s}\\
+t & \frac{1}{s^2}\\
+\frac{t^{n-1}}{(n-1)!} & \frac{1}{s^n}, n \in \mathbb{N}\\
+\frac{t^{a-1}}{\Gamma(a)} & \frac{1}{s^a}\\
+e^{-at} &  \frac{1}{s+a}\\
+\frac{t^{n-1}e^{-at}}{(n-1)!} & \frac{1}{(s+a)^n}, n \in \mathbb{N}\\
+\frac{e^{-at}-e^{-bt}}{b - a} & \frac{1}{(s+a)(s+b)}, a \neq b\\
+\frac{1}{a}\sin(at) & \frac{1}{s^2 + a^2}\\
+\cos(at) & \frac{s}{s^2+a^2}\\
+\frac{1}{a}\sinh(at) & \frac{1}{s^2-a^2}\\
+\cosh(at) & \frac{s}{s^2-a^2}\\
+\frac{1-\cos(at)}{a^2} & \frac{1}{s(s^2+a^2)}\\
+\frac{at - \sin(at)}{a^3} & \frac{1}{s^2(s^2 + a^2)}\\
+\frac{\sin(at) - at\cos(at)}{2a^3} & \frac{1}{(s^2 + a^2)^2}\\
+
+\frac{t\sin(at)}{2a} & \frac{s}{(s^2+a^2)^2}\\
+\frac{\sin(at) + at\cos(at)}{2a} & \frac{s^2}{(s^2 + a^2)^2}\\
+\frac{b\sin(at) - a\sin(bt)}{ab(b^2 - a^2)} & \frac{1}{(s^2+a^2)(s^2+b^2)}, a^2 \neq b^2
+\frac{\cos(at) - \cos(bt)}{b^2 - a^2} & \frac{s}{(s^2+a^2)(s^2+b^2)}, a^2 \neq b^2
+\frac{1}{b}e^{-at}\sin(bt) & \frac{1}{(s+a)^2 + b^2}\\
+e^{-at}\cos(bt) & \frac{s+a}{(s+a)^2 + b^2}\\
+\frac{\sinh(at) - \sin(at)}{2a^3} & \frac{1}{s^4 - a^4}\\
+\frac{\sin(at)\sinh(at)}{2a^2} & \frac{s}{s^4+4a^4}\\
+\frac{1}{\sqrt{\pi t}} & \frac{1}{\sqrt{s}}\\
+\frac{\sin{at}{t}} & \arctan{\frac{a}{s}}\\
+u(t) - u(t-k) & \frac{1-e^{-ks}}{s}\\
+\frac{(t-k)^{a-1}}{\Gamma(a)}u(t-k) & \frac{1}{s^a}e^{-ks}, a > 0\\
+\sum_{n=0}^\inf u(t-nk) & \frac{1}{s(1-e^{-ks})}\\
+\frac{1}{2}(\sin(t) + \|\sin(t)\|) & \frac{1}{(s^2 + 1)(1 - e^{\pi s})}\\
+\|\sin(at)\| & \frac{a\coth(\frac{\pi s}{2 a})}{s^2 + a^2}
+\end{align*}
diff --git a/math/levi_cevita.org b/src/math/levi_cevita.org
index aaa2074..983130e 100644
--- a/math/levi_cevita.org
+++ b/src/math/levi_cevita.org
@@ -1,12 +1,11 @@
-#+TITLE: The Levi Cevita Symbol
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
+#+title: The Levi Cevita Symbol
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Levi Cevita symbol
 \begin{equation*}
 \varepsilon_{ijk} = \left\{\begin{array}{rl}
diff --git a/math/matrices.org b/src/math/matrices.org
index a7ba58b..c968f8c 100644
--- a/math/matrices.org
+++ b/src/math/matrices.org
@@ -1,22 +1,23 @@
-#+TITLE:Matrix Properties
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
+#+title:Matrix Properties
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Basic properties
 \begin{align*}
 A + B = B + A
 \end{align*}
+
 * Dot product
 \begin{align*}
 (A^\text{T})^\text{T} &= A\\
 (A + B)^\text{T} &= A^\text{T} + B^\text{T}\\
 (AB)^\text{T} &= B^\text{T}A^\text{T}
 \end{align*}
+
 * Transpose
 \begin{align*}
 \bm{a} \cdot \bm{b} &= \overline{\bm{b}} \cdot \bm{a}\\
diff --git a/math/orbit.org b/src/math/orbit.org
index 88079a6..5e4040a 100644
--- a/math/orbit.org
+++ b/src/math/orbit.org
@@ -1,15 +1,11 @@
-#+TITLE:Orbit
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \usepackage{amssymb}
-#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}#1}{\text{d}#2}}
-#+LATEX_HEADER: \newcommand{\unitv}[1]{\bm{\hat{e}}_#1}
+#+title:Orbit
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Deriving Kepler's first law from Newton's law of universal gravitation
 
 The movement of an object with mass $m$ orbiting another body with mass $M$ is
@@ -18,76 +14,76 @@ the position of the larger object constant and use it as the origin of our
 coordinate system. Then the following equation applies for movement of the
 smaller object:
 
-\begin{equation*}
+{{{beg-eqn}}}
 m\ddot{\bm{r}} = - \frac{GMm}{r^3}\bm{r} \Leftrightarrow \ddot{\bm{r}} = - \frac{GM}{r^3}\bm{r}
-\end{equation*}
+{{{end-eqn}}}
 
 In order to solve this differential equation we first consider the angular
 momentum of or object around its orbit.
 
-\begin{equation*}
+{{{beg-eqn}}}
 \bm{L} = \bm{r} \times m \dot{\bm{r}}
-\end{equation*}
+{{{end-eqn}}}
 
 In the abscense of external toques, because the only force acting on the object
 is parallel to its position, the angular momentum is conserved.
 
-\begin{equation*}
+{{{beg-eqn}}}
 \deriv{\bm{L}}{t} = \dot{\bm{r}} \times m \dot{\bm{r}} + \bm{r} \times m \ddot{\bm{r}} = 0
-\end{equation*}
+{{{end-eqn}}}
 
 We now multiply both sides of our equation from the right by the angular
 momentum and develop the right side of the equation using vector identities.
 
-\begin{align*}
+{{{beg-align}}}
 \ddot{\bm{r}} \times \bm{L} &= -GM\frac{\bm{r} \times \left(\bm{r} \times m \dot{\bm{r}}\right)}{r^3}\\
 &= - \frac{GMm}{r^3} \left(\left(\bm{r} \cdot \dot{\bm{r}}\right)\bm{r} - \left(\bm{r} \cdot \bm{r}\right)\dot{\bm{r}}\right)\\
 &= GMm\left(\frac{\left(\bm{r} \cdot \bm{r}\right)\dot{\bm{r}}}{r^3} - \frac{\left(\bm{r} \cdot \dot{\bm{r}}\right)\bm{r}}{r^3}\right)\\
 &= GMm\left(\frac{\dot{\bm{r}}}{r} - \frac{\left(\bm{r} \cdot \dot{\bm{r}}\right)\bm{r}}{r^3}\right)\\
 &= GMm\left(\frac{1}{r} \deriv{\bm{r}}{t} + \deriv{}{t}\left(\frac{1}{r}\right)\bm{r}\right)\\
 &= GMm\deriv{}{t}\left(\frac{\bm{r}}{r}\right)
-\end{align*}
+{{{end-align}}}
 
 We observe that each side of our equation is a derivative of a quantity. We know
 integrate both sides and take the integrations constant into account.
 
-\begin{align*}
+{{{beg-align}}}
 & \deriv{}{t} \left(\dot{\bm{r}} \times \bm{L}\right) = GM \deriv{}{t}\left(\frac{\bm{r}}{r}\right)\\
 \Leftrightarrow \quad & \dot{\bm{r}} \times \bm{L} = GM \frac{\bm{r}}{r} + \bm{a}
-\end{align*}
+{{{end-align}}}
 
 Our objective is now to solve the equation for $r$, so we multiply both sides by $\bm{r}$:
 
-\begin{align*}
+{{{beg-align}}}
 \dot{\bm{r}} \times \left(\bm{r} \times \dot{\bm{r}}\right) &= GM \frac{\bm{r}}{r} + \bm{a}\\
 \bm{r} \cdot \left(\dot{\bm{r}} \times \left(\bm{r} \times \dot{\bm{r}}\right)\right) &= GMr + \bm{r} \cdot \bm{a}
-\end{align*}
+{{{end-align}}}
 
 By applying a cyclic permutation of the resulting triple product and using the
 known property of the scalar product we now express the equation only in terms
 of the magnitudes of the vectors.
 
-\begin{align*}
+{{{beg-align}}}
 \left(\bm{r} \times \dot{\bm{r}}\right) \cdot \left(\bm{r} \times \dot{\bm{r}}\right) &= GMr + \bm{r} \cdot \bm{a}\\
 \left(\frac{L}{m}\right)^2 &= GMr + \bm{r} \cdot \bm{a}\\
 \left(\frac{L}{m}\right)^2 &= GMr + r a \cos\theta
-\end{align*}
+{{{end-align}}}
 
 The last steps are to solve for $r$
 
-\begin{align*}
+{{{beg-align}}}
 r &= \left(\frac{L}{m}\right)^2 \frac{1}{GM + a \cos\theta}\\
 &= \left(\frac{L}{m}\right)^2 \frac{1}{GM} \frac{1}{1 + \frac{a}{GM} \cos\theta}\\
 &= \left(\frac{L}{m}\right)^2 \frac{1}{GM} \frac{1}{1 + e\cos\theta}
-\end{align*}
+{{{end-align}}}
 
 Finally we reach our result. Objects orbiting according to Newton's Law of
 Gravitation follow paths that correspond to the conic sections. Here is Kepler's
 first Law a special case, where our object has a stable orbit around the larger
 body.
 
-\begin{equation*}
+{{{beg-eqn}}}
 r &= \frac{L^2}{GM m^2} \frac{1}{1 + e\cos\theta}
-\end{equation*}
+{{{end-eqn}}}
 
 * Deriving a physical interpretation of the excentricity of the orbit
diff --git a/math/polar_coordinates.org b/src/math/polar_coordinates.org
index ff07be3..0d26138 100644
--- a/math/polar_coordinates.org
+++ b/src/math/polar_coordinates.org
@@ -1,14 +1,11 @@
-#+TITLE:Polar Coordinates
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}#1}{\text{d}#2}}
-#+LATEX_HEADER: \newcommand{\unitv}[1]{\bm{\hat{e}}_#1}
+#+title:Polar Coordinates
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Coordinate transformations
 \begin{align*}
 x &= r \cos\theta\\
@@ -27,6 +24,7 @@ y &= r \sin\theta
 \deriv{\unitv{r}}{t} &= \dot{\theta}\unitv{\theta}\\
 \deriv{\unitv{\theta}}{t} &= -\dot{\theta}\unitv{r}
 \end{align*}
+
 ** Position vector and its time derivatives
 \begin{align*}
 \bm{r} &= r\unitv{r}\\
diff --git a/src/math/spherical-harmonics.org b/src/math/spherical-harmonics.org
new file mode 100644
index 0000000..b5183b5
--- /dev/null
+++ b/src/math/spherical-harmonics.org
@@ -0,0 +1,119 @@
+#+title: Solving the laplace equation in Spherical coordinates
+#+author: Thomas Albers Raviola
+#+date: 2022-12-15
+#+setupfile: ../../math_options.org
+
+* Disclaimer
+This site as of now just a technology demonstration and its claims
+should not be taken as true (even though I myself am pretty confident
+they are)
+
+* Laplace equation
+
+{{{beg-eqn}}}
+\Delta \phi = 0
+{{{end-eqn}}}
+
+Solutions to this equation are called harmonics
+
+* Laplace equation in spherical coordinates
+
+Using the definition for the laplace operator in spherical coordinates, it
+follows:
+
+{{{beg-align}}}
+\frac{1}{r^2}\pderiv{}{r}\left(r^2 \pderiv{\phi}{r}\right) + \frac{1}{r^2\sin\theta} \pderiv{}{\theta}\left(\sin\theta\pderiv{\phi}{\theta}\right) + \frac{1}{r^2\sin^2\theta}\frac{\partial^2\phi}{\partial\varphi^2} &= 0\\
+\pderiv{}{r}\left(r^2 \pderiv{\phi}{r}\right) + \frac{1}{\sin\theta} \pderiv{}{\theta}\left(\sin\theta\pderiv{\phi}{\theta}\right) + \frac{1}{\sin^2\theta}\frac{\partial^2\phi}{\partial\varphi^2} &= 0
+{{{end-align}}}
+
+Using sepration of variables $\phi$ becomes
+{{{beg-eqn}}}
+\phi(r, \theta, \varphi) = R(r)Y(\theta, \varphi)
+{{{end-eqn}}}
+
+Applying this to the original equation produces
+
+{{{beg-align}}}
+\pderiv{}{r}\left(r^2 \pderiv{R}{r}\right)Y(\theta, \phi) + \left(\frac{1}{\sin\theta} \pderiv{}{\theta}\left(\sin\theta\pderiv{\phi}{\theta}\right) + \frac{1}{\sin^2\theta}\frac{\partial^2\phi}{\partial\varphi^2}\right)R(r) &= 0\\
+\frac{1}{R(r)}\pderiv{}{r}\left(r^2 \pderiv{R}{r}\right) + \frac{1}{Y(\theta, \phi)}\left(\frac{1}{\sin\theta} \pderiv{}{\theta}\left(\sin\theta\pderiv{\phi}{\theta}\right) + \frac{1}{\sin^2\theta}\frac{\partial^2\phi}{\partial\varphi^2}\right) &= 0
+{{{end-align}}}
+
+Because the terms depend on different independant variables, the only way the
+equation holds is if both terms are constant.
+
+{{{beg-align}}}
+&\frac{1}{R(r)}\pderiv{}{r}\left(r^2 \pderiv{R}{r}\right) = \lambda\\
+&\frac{1}{Y(\theta, \phi)}\left(\frac{1}{\sin\theta} \pderiv{}{\theta}\left(\sin\theta\pderiv{Y}{\theta}\right)+ \frac{1}{\sin^2\theta}\frac{\partial^2Y}{\partial\varphi^2}\right) = -\lambda
+{{{end-align}}}
+
+* Angle dependant term
+We again use separation of variables to solve the partial differential equation
+of the angle dependant term.
+
+{{{beg-eqn}}}
+Y(\theta, \varphi) = \Theta(\theta)\Phi(\varphi)
+{{{end-eqn}}}
+
+Replacing into the equation
+
+{{{beg-eqn}}}
+\lambda\sin^2\theta + \frac{\sin\theta}{\Theta(\theta)}\pderiv{}{\theta}\left(\sin\theta\pderiv{\Theta}{\theta}\right)
++ \frac{1}{\Phi(\varphi)}\frac{\partial^2\Phi}{\partial\varphi^2} = 0
+{{{end-eqn}}}
+
+Based on a similar argument it follows that both terms must be constant, with
+this we may now solve for $\Phi$
+
+{{{beg-eqn}}}
+\frac{1}{\Phi(\varphi)}\frac{\partial^2\Phi}{\partial\varphi^2} = -m^2
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\Phi(\varphi) = e^{-m\varphi{}i}
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\lambda\sin^2\theta + \frac{\sin\theta}{\Theta(\theta)}\pderiv{}{\theta}\left(\sin\theta\pderiv{\Theta}{\theta}\right) = m^2
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+l(l+1)\sin^2(\theta)\Theta(\theta) + \pderiv{}{\theta}\left(\sin\theta\pderiv{\Theta}{\theta}\right) = m^2\Theta(\theta)
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+l(l+1)\sin^2(\theta)\Theta(\theta) + \sin(\theta)\left(\cos(\theta) \Theta'(\theta) + \sin(\theta) \Theta''(\theta)\right) = m^2\Theta(\theta)
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\sin^2(\theta) \Theta''(\theta) + \sin(\theta)\cos(\theta) \Theta'(\theta) + (l(l+1)\sin^2(\theta) - m^2)\Theta(\theta) = 0
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\Theta''(\theta) + \cot(\theta)\Theta'(\theta) + \left(l(l+1) - \frac{m^2}{\sin^2\theta}\right)\Theta(\theta) = 0
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\Theta(\theta) = P(\cos \theta)
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\cot(\theta)\Theta'(\theta) = \cot(\theta) \deriv{}{\theta}P(\cos \theta)=-\cos(\theta) P'(\cos\theta)
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\frac{\text{d}^2}{\text{d}\theta^2}(P(\cos\theta)) = \sin^2(\theta) P''(\cos\theta) - \cos(\theta) P'(\cos\theta)
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+\sin^2(\theta) P''(\cos\theta) - 2\cos(\theta) P'(\cos\theta) + \left(l(l+1)-\frac{m^2}{\sin^2\theta}\right)P(\cos\theta) = 0
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+x = \cos\theta
+{{{end-eqn}}}
+
+{{{beg-eqn}}}
+(1 - x^2)P''(x) - 2xP'(x) + \left(l(l+1)-\frac{m^2}{1-x^2}\right)P(x) = 0
+{{{end-eqn}}}
+
+Solve using Frobenius Method
diff --git a/math/spherical_coordinates.org b/src/math/spherical_coordinates.org
index 1c7fd9c..bf3b8d0 100644
--- a/math/spherical_coordinates.org
+++ b/src/math/spherical_coordinates.org
@@ -1,14 +1,11 @@
-#+TITLE:Spherical Coordinates
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
-#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}#1}{\text{d}#2}}
-#+LATEX_HEADER: \newcommand{\unitv}[1]{\bm{\hat{e}}_#1}
+#+title:Spherical Coordinates
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
 should not be taken as true (even though I myself am pretty confident
 they are)
+
 * Coordinate transformations
 \begin{align*}
 x &= r \sin\theta \cos\varphi\\
@@ -22,6 +19,7 @@ z &= r \cos\theta
 \bm{\hat{e}}_\theta &= \cos\theta \cos\varphi \bm{\hat{e}}_x + \cos\theta \sin\varphi \bm{\hat{e}}_y - \sin\theta \bm{\hat{e}}_z\\
 \bm{\hat{e}}_\varphi &= - \sin\theta \sin\varphi \bm{\hat{e}}_x + \sin\theta \cos\varphi \bm{\hat{e}}_y
 \end{align*}
+
 * Kinematic in spherical coordinates
 ** Time derivatives of the local unit vectors
 \begin{align*}
@@ -29,6 +27,7 @@ z &= r \cos\theta
 \deriv{\unitv{\theta}}{t} &= -\dot{\theta}\unitv{r} + \dot{\varphi}\cos\theta \unitv{\varphi}\\
 \deriv{\unitv{\varphi}}{t} &= -\dot{\varphi} \left(\sin\theta\unitv{r} + \cos\theta\unitv{\theta}\right)
 \end{align*}
+
 ** Position vector and its time derivatives
 \begin{align*}
 \bm{r} &= r\unitv{r}\\
diff --git a/math/trigonometry.org b/src/math/trigonometry.org
index 3e81eeb..d2afc32 100644
--- a/math/trigonometry.org
+++ b/src/math/trigonometry.org
@@ -1,7 +1,5 @@
-#+TITLE:Trigonometric identities
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
+#+title:Trigonometric identities
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
@@ -14,27 +12,32 @@ they are)
 &\tan^2\left(x\right) + 1                    = \sec^2\left(x\right)\\
 &1                    + \cot^2\left(x\right) = \csc^2\left(x\right)
 \end{align*}
+
 * Sum of angles
 \begin{align*}
 &\sin\left(a \pm b\right) = \sin\left(a\right)\cos\left(b\right) \pm \cos\left(a\right)\sin\left(b\right)\\
 &\cos\left(a \pm b\right) = \cos\left(a\right)\cos\left(b\right) \mp \sin\left(a\right)\sin\left(b\right)\\
 &\tan(a \pm b) = \frac{\tan(a) \pm \tan(b)}{1 \mp \tan(a) \tan(b)}
 \end{align*}
+
 * Multiple angles
 \begin{align*}
 &\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\
 &\cos(2\theta) = \cos^2\theta - \sin^2\theta = 2\cos^2\theta - 1 = 1 - 2\sin^2\theta
 \end{align*}
+
 * Half-angle formulae
 \begin{align*}
 &\sin \frac{\theta}{2} = \pm \sqrt{\frac{1-\cos\theta}{2}}\\
 &\cos \frac{\theta}{2} = \pm \sqrt{\frac{1+\cos\theta}{2}}
 \end{align*}
+
 * Power-reduction formulae
 \begin{align*}
 &\sin^2\theta = \frac{1 - \cos(2\theta)}{2}\\
 &\cos^2\theta = \frac{1 + \cos(2\theta)}{2}
 \end{align*}
+
 * Product-to-sum formulae
 \begin{align*}
 &2 \cos\theta \cos\varphi = \cos(\theta-\varphi) + \cos(\theta+\varphi)\\
@@ -42,6 +45,7 @@ they are)
 &2 \sin\theta \cos\varphi = \sin(\theta+\varphi) + \sin(\theta-\varphi)\\
 &2\cos\theta\sin\varphi = \sin(\theta+\varphi) - \sin(\theta-\varphi)
 \end{align*}
+
 * Sum-to-product formulae
 \begin{align*}
 &\sin\theta \pm \sin\varphi = 2 \sin\left(\frac{\theta\pm\varphi}{2}\right) \cos\left(\frac{\theta\mp\varphi}{2}\right)\\
diff --git a/src/math/variation.org b/src/math/variation.org
new file mode 100644
index 0000000..fcbfb14
--- /dev/null
+++ b/src/math/variation.org
@@ -0,0 +1,19 @@
+#+title:Variation Calculus
+#+author: Thomas Albers Raviola
+#+date: 2022-10-01
+#+setupfile: ../../math_options.org
+
+* Disclaimer
+This site as of now just a technology demonstration and its claims
+should not be taken as true (even though I myself am pretty confident
+they are)
+
+* Beltrami identity
+\begin{align*}
+\deriv{}{x}\pderiv{F}{\dot{y}} &= \pderiv{F}{y}\\
+\deriv{}{x}\left(\pderiv{F}{\dot{y}}\right)\deriv{y}{x} &= \pderiv{F}{y}\deriv{y}{x}\\
+\deriv{}{x}\left(\pderiv{F}{\dot{y}}\right)\deriv{y}{x} + \pderiv{F}{\dot{y}}\deriv{\dot{y}}{x} + \pderiv{F}{x} &= \pderiv{F}{y}\deriv{y}{x} + \pderiv{F}{\dot{y}} \deriv{\dot{y}}{x} + \pderiv{F}{x}\\
+\deriv{}{x}\left(\pderiv{F}{\dot{y}}\dot{y}\right) + \pderiv{F}{x} &= \deriv{F}{x}\\
+\deriv{}{x}\left(\pderiv{F}{\dot{y}}\dot{y} - F\right) &= - \pderiv{F}{x}\\
+\pderiv{F}{\dot{y}}\dot{y} - F\right &= C
+\end{align*}
diff --git a/math/vectors.org b/src/math/vectors.org
index 49d8132..ceab691 100644
--- a/math/vectors.org
+++ b/src/math/vectors.org
@@ -1,7 +1,5 @@
-#+TITLE:Cross Product
-#+SETUPFILE: ../math_options.org
-#+LATEX_HEADER: \usepackage{bm}
-#+LATEX_HEADER: \usepackage{mathtools}
+#+title:Cross Product
+#+setupfile: ../../math_options.org
 
 * Disclaimer
 This site as of now just a technology demonstration and its claims
diff --git a/src/physics/lorentz-transformation.org b/src/physics/lorentz-transformation.org
new file mode 100644
index 0000000..a5e3c8f
--- /dev/null
+++ b/src/physics/lorentz-transformation.org
@@ -0,0 +1,62 @@
+#+TITLE:Lorentz Transformation
+#+SETUPFILE: ../math_options.org
+#+LATEX_HEADER: \usepackage{bm}
+#+LATEX_HEADER: \usepackage{mathtools}
+#+LATEX_HEADER: \newcommand{\dcoff}[1]{\frac{\text{d}}{\text{d}x} #1}
+#+LATEX_HEADER: \newcommand{\sdcoff}[1]{\frac{\text{d}#1}{\text{d}x}}
+#+LATEX_HEADER: \newcommand{\deriv}[2]{\frac{\text{d}}{\text{d}x} #1 &= #2}
+
+As a direct consequence of the second postulate, it follows, that for 2 events
+in spacetime describing the propagation of a beam of light it must hold
+
+\begin{equation*}
+c^2(t_2 - t_1)^2 - (x_2 - x_1)^2 - (y_2 - y_1)^2 - (z_2 - z_1)^2 = 0
+\end{equation*}
+
+To abbreviate we introduce the following expressions
+
+\begin{align*}
+t &= t_2 - t_1\\
+x &= x_2 - x_1\\
+y &= y_2 - y_1\\
+z &= z_2 - z_1
+\end{align*}
+
+Furthermore, because this must also hold in any other reference frame, for
+example $\Sigma'$, we have:
+
+\begin{equation*}
+c^2t^2 - x^2 - y^2 - z^2 = c^2{t'}^2 - {x'}^2 - {y'}^2 - {z'}^2 = 0
+\begin{end*}
+
+We introducing the Minkowski metric $\eta$ and rewrite this using matrices
+
+\begin{equation*}
+\sum_{\mu\nu} \eta_{\mu\nu} {x'}_\mu {x'}_\nu = \sum_{\alpha\beta} \eta_{\alpha\beta} x_\alpha x_\beta
+\end{equation*}
+
+Let us now consider some inertial system $\Sigma'$ that is moving away in
+respect to $\Sigma$ with some constant speed $v$ in the x direction. We are
+interested in the transformation that will allow us to convert the coordinates
+between this 2 systems.
+
+Further development of our last equation yields:
+
+\begin{align*}
+\sum_{\alpha\beta} \eta_{\alpha\beta} x_\alpha x_\beta &= \sum_{\mu\nu} \eta_{\mu\nu} \left(\sum_\alpha \Lambda_{\mu\alpha} x_\alpha \right) \left(\sum_\beta \Lambda_{\nu\beta} x_\beta \right)\\
+&= \sum_{\mu\nu\alpha\beta} \eta_{\mu\nu} \Lambda_{\mu\alpha} \Lambda_{\nu\beta} x_\alpha x_\beta
+\end{align*}
+
+From this we notice
+
+\begin{align*}
+\eta_{\alpha\beta} &= \sum_{\mu\nu} \eta_{\mu\nu} \Lambda_{\mu\alpha} \Lambda_{\nu\beta}\\
+&=\sum_{\mu\nu} (\Lambda^\text{T})_{\alpha\mu} \eta_{\mu\nu} \Lambda_{\nu\beta}\\
+&=\sum_{\nu} \left(\sum_\mu (\Lambda^\text{T})_{\alpha\mu} \eta_{\mu\nu}\right) \Lambda_{\nu\beta}
+\end{align*}
+
+And thus
+
+\begin{equation*}
+\eta = \Lambda^\text{T}\eta\Lambda
+\end{equation*}
diff --git a/src/style.css b/src/style.css
deleted file mode 100644
index bd731ad..0000000
--- a/src/style.css
+++ /dev/null
@@ -1,123 +0,0 @@
-html {
-    height: 100%;
-    color: #cccccc;
-    background-color: hsl(240, 30%, 10%);/*#452b41*/ /*#2c314b*/
-}
-
-body {
-    margin: auto;
-    max-width: 64em;
-    min-height: 100%;
-    display: flex;
-    flex-direction: column;
-    background-color: hsl(240, 30%, 15%);
-}
-
-nav {
-    /*#3a2438*/ /*#2a3257*/
-    background-color: hsl(240, 30%, 20%);
-}
-
-nav > ul {
-    display: flex;
-    margin: 0 auto;
-}
-
-nav > ul > li:last-child {
-    margin-left: auto;
-}
-
-nav ul {
-    padding: 0;
-}
-
-nav li {
-    margin: 2px;
-    display: block;
-    list-style: none;
-}
-
-nav li:hover {
-    background-color: hsl(240, 30%, 30%);
-}
-
-nav .submenu:hover .submenu-contents {
-    display: block;
-}
-
-nav .submenu-contents {
-    display: none;
-    position: absolute;
-    z-index: 10;
-    background-color: red;
-}
-
-nav a,
-nav span {
-    text-decoration: none;
-    color: #dddddd;
-    display: block;
-    line-height: 2em;
-    height: 2em;
-    margin-left: 1em;
-    margin-right: 1em;
-}
-
-nav span {
-    cursor: pointer;
-}
-
-.article-date {
-    margin-left: auto;
-}
-
-.link-like, a {
-    color: #eeeeee;
-    text-decoration: underline;
-}
-
-.rel-header {
-    padding: 1em 2em 1em 2em;
-}
-
-header {
-    background-color: hsl(240, 30%, 10%);
-}
-
-header p {
-    text-align: center;
-    margin-bottom: 0.15em;
-}
-
-header p ~ h1 {
-    margin-top: 0.15em;
-}
-
-main {
-    padding: 2em 2em 2em 2em;
-    flex-grow: 1;
-}
-
-hr {
-    margin: 0;
-    margin-top: auto;
-}
-
-footer {
-    padding: 1em 2em 1em 2em;
-}
-
-figure {
-    text-align: center;
-}
-
-figure img {
-    max-width: 30em;
-    object-fit: contain;
-    display: block;
-    margin: auto;
-}
-
-h1, h2, h3, h4, h5, h6 {
-    text-align: center;
-}
diff --git a/src/svg/fft.tex b/src/svg/fft.tex
new file mode 100644
index 0000000..82af9df
--- /dev/null
+++ b/src/svg/fft.tex
@@ -0,0 +1,44 @@
+\documentclass{standalone}
+
+\usepackage{tikz}
+
+\begin{document}
+\begin{tikzpicture}
+  \foreach \y in {7,6,...,0} {
+    \draw (0,\y) node {$\xi_\y$};
+    \draw (.3, \y) -- (.7,\y);
+    \draw (6.4, \y) -- (7, \y);
+    \draw (7.05, \y) circle (0.05);
+    \draw (.25, \y) circle (0.05);
+
+    \draw (8.95, \y) -- (10.25, \y);
+    \draw (9.25,\y+0.3) node {$W_N^\y$};
+    \draw (10.3, \y) circle (0.05);
+    \draw (10.7,\y) node {$x_\y$};
+  }
+
+  \foreach \y in {0, 1, 2, 3} {
+    \draw (6.8,\y+4+0.3) node {$O_\y$};
+    \draw (6.8,\y+0.3) node {$E_\y$};
+    \draw[->,red] (7.1, \y) -- (8.95, \y+4);
+    \draw[->, blue] (7.1, \y+4) -- (8.95, \y);
+
+    \draw[->, blue] (7.1, \y) -- (8.95, \y);
+    \draw[->, red] (7.1, \y+4) -- (8.95, \y+4);
+
+    \draw[->] (.7, 2 * \y) -- (2.2, \y);
+    \draw (2.25, \y + 4) circle (0.05);
+    \draw (2.3, \y + 4) -- (3, \y + 4);
+
+    \draw[->] (.7, 2 * \y + 1) -- (2.2, \y+4);
+    \draw (2.25, \y) circle (0.05);
+    \draw (2.3, \y) -- (3, \y);
+  }
+
+  \draw (3, -.2) rectangle  (6.4, 3.2);
+  \draw (3, 3.8) rectangle  (6.4, 7.2);
+  \draw (.7, 8) rectangle  (9.7, -1);
+  \draw (4.6, 1.5) node {$N/2$-FFT};
+  \draw (4.6, 5.5) node {$N/2$-FFT};
+\end{tikzpicture}
+\end{document}
diff --git a/src/z80/prototype1.org b/src/z80/prototype1.org
index 23adec1..c9e8b0a 100644
--- a/src/z80/prototype1.org
+++ b/src/z80/prototype1.org
@@ -50,7 +50,7 @@ managed to get all the components and build my first working
 prototype. It did not look beautiful, but it was functional.
 
 #+CAPTION: Prototype 1 together with its serial terminal
-[[https://thomaslabs.org/media/prototype1.jpg]]
+[[/img/prototype1.jpg]]
 
 I wasn't satisfied with this prototype though. It was not what I had
 envisioned. I wanted to have a pocket computer and this was nothing
diff --git a/src/z80/prototype2.org b/src/z80/prototype2.org
index ba19bd7..549c18e 100644
--- a/src/z80/prototype2.org
+++ b/src/z80/prototype2.org
@@ -9,7 +9,7 @@ m4_define(`_REL_HEADER', `Next: <ahref="/z80/prototype1.html">Prototype 1</a> Up
 {{{date_place(Bremen, Germany)}}}
 
 #+CAPTION: Prototype 2
-[[https://thomaslabs.org/media/prototype2_1.jpg]]
+[[/img/prototype2_1.jpg]]
 
 Because when moving to Bremen, I wasn't able to take my old Prototype
 with me, I had to build a new one. This time though, I needed
@@ -41,7 +41,7 @@ Prototype 2
 - Dual serial ports with complete modem control lines
 
 #+CAPTION: Prototype 2 together with screen
-[[https://thomaslabs.org/media/prototype2_2.jpg]]
+[[/img/prototype2_2.jpg]]
 
 It didn't take long until Prototype 2 became incapable of fulfilling
 its task. Once it was clear, which parts would definitely be part of
diff --git a/template.el b/template.el
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/template.el