deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 6c96951..54e2f6c 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} $ \frac{i \kappa_{ab}}{\beta_c}sin\beta_c(z-z_0)e^{i \delta (z+z_0)\\  \end{bmatrix}  \tilde{B}(z_0) \\ & as\\  \end{bmatrix}\]