deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 10a94c4..b9f18b8 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\end{bmatrix}=\begin{bmatrix}  \frac{\beta_c cos \beta_c(z)-i\delta sin \beta_c(z)}{\beta_c}e^{i \delta (z)} & 0\\  \frac{i \kappa_{ba}}{\beta_c}sin\beta_c(z)e^{-i \delta (z)} & 0\\   \end{bmatrix} \]