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authorThomas Albers <thomas@thomaslabs.org>2023-03-08 23:43:00 +0100
committerThomas Albers <thomas@thomaslabs.org>2023-03-08 23:43:00 +0100
commit61b5ce20f25c5785e41574998a12c6d06eb05a5e (patch)
tree20e2225b4f30b15d8dee30351041d1f33d42b34a /src/math/matrices.org
parent561bac75579391c14e47eaccfabdf9eda98855da (diff)
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+#+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}\\
+\bm{a} \cdot \bm{b} &= \bm{a}^\text{T} \bm{b}
+\end{align*}
+
+* Hermitian transpose
+\begin{align*}
+A^\ast &= \left[\overline{a_{ij}}\right]\\
+(\lambda A)^\ast &= \left[\overline{\lambda a_{ij}}\right] = \overline{\lambda} \left[a_{ij}\right]^\ast = \overline{\lambda}\,\overline{A}\\
+A^\dag &= (A^\ast)^\text{T}\\
+A^{\dag\dag} &= A
+\end{align*}