deletions | additions       diff --git a/Eigenvalues.tex b/Eigenvalues.tex  index 241fce4..f0c4ef7 100644  --- a/Eigenvalues.tex  +++ b/Eigenvalues.tex 
...
Then for a 3x3 matrix the similar thing \begin{equation}  |[A_{11},A_{22},A_{33}]| = |[A_{11},A_{22}]|A_{33}+|[A_{12},A_{23}]|+|[A_{13},A_{21}]|A_{32} |[A_{11},A_{22}]|A_{33}+|[A_{12},A_{23}]|A_{31}+|[A_{13},A_{21}]|A_{32}  \end{equation}