deletions | additions       diff --git a/test_begin_matrix_widetilde_A__.tex b/test_begin_matrix_widetilde_A__.tex  index 07d7e16..480f6bc 100644  --- a/test_begin_matrix_widetilde_A__.tex  +++ b/test_begin_matrix_widetilde_A__.tex 
...
test  $$\begin{matrix}  \widetilde{A}(z) \\kappa_{aa}=\frac{\tilde{\kappa_{aa}}{1}  & yea \\ \widetilde{B}(z) & yea \\  \end{matrix}$$