adding some stuff needed for the theory block

src/musrgui/latex_images/combiLGKT.tex

@@ -0,0 +1,9 @@
+\documentclass[12pt]{article}
+\pagestyle{empty}
+\begin{document}
+
+\begin{displaymath}
+1/3 \left[ 1 + 2\, \left\{ 1 - (\sigma t)^2 - \lambda t\right\}\right]\, e^{-(\sigma t)^2/2 - \lambda t}
+\end{displaymath}
+
+\end{document}