deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 7f06534..ad6b6a0 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\begin{bmatrix}  \frac{\beta_c cos \beta_c(z-z_0)-i\delta sin \beta_c(z-z_0)}{\beta_c})e^{i \delta (z+z_0)} & \frac{i \kappa_{ab}}{\beta_c}sin\beta_c(z-z_0)e^{i \delta (z+z_0)}\\  \end{bmatrix}  \begin{bmatrix}  \tilde{B}(z_0) & as\\   \end{bmatrix} \]