--- a/slides/slides07.tex	Tue Nov 17 01:58:50 2015 +0000
+++ b/slides/slides07.tex	Tue Nov 17 04:02:08 2015 +0000
@@ -581,9 +581,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
 \begin{frame}[t]
-\frametitle{\begin{tabular}{c}Compiling Whiles\end{tabular}}
+\frametitle{Compiling Whiles}
 
 {\Large\bl{$\text{while}\;b\;\text{do}\;cs$}}\bigskip\bigskip
 
@@ -615,14 +614,12 @@
 \end{tikzpicture}
 \end{center}
 
-
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
 \begin{frame}[t]
-\frametitle{\begin{tabular}{c}Compiling Whiles\end{tabular}}
+\frametitle{Compiling Whiles}
 
 {\Large\bl{while $b$ do $cs$}}
 
@@ -640,7 +637,7 @@
 \end{tabular}}
 \end{center}
 
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%