deletions | additions       diff --git a/Complex.tex b/Complex.tex  index d97a00a..382c509 100644  --- a/Complex.tex  +++ b/Complex.tex 
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M_{ij}=\sum_{k=0}^1 a_{i \oplus k,k}b_{i \oplus k,j \oplus k}  \end{equation}  where $\oplus$ is the logical XOR operation.  We have the following results \begin{equation}  \begin{bmatrix}1&0\\0&0\end{bmatrix}\#\mat{1}{1}{1}{1}=\begin{bmatrix}1&1\\0&0\end{bmatrix}\\