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Matrix inverse¶

Diagonal¶

If we want to invert an diagonal matrix we replace it by its reciprocal

\[\begin{split} \begin{bmatrix} A & 0 \\ 0 & B \end{bmatrix}^{ - 1} = \begin{bmatrix} \frac{1}{A} & 0 \\ 0 & \frac{1}{B} \end{bmatrix} \end{split}\]