deletions | additions       diff --git a/Eigenvalues.tex b/Eigenvalues.tex  index c53ec52..bb55d91 100644  --- a/Eigenvalues.tex  +++ b/Eigenvalues.tex 
...
We can write in summation form \begin{equation}  |[A_{00},A_{11},A_{22}]| = \sum_{i=0}^2 |[A_{0,0+i mod \;mod\;  4},A_{1,1+i mod \;mod\;  4}]|A_{2,2+i mod \;mod\;  4} \end{equation}