diff --git a/programming/lectures/programming_basics.tex b/programming/lectures/programming_basics.tex
index 01db468..58036a6 100644
--- a/programming/lectures/programming_basics.tex
+++ b/programming/lectures/programming_basics.tex
@@ -624,6 +624,11 @@
 \end{frame}
 
 
+\begin{frame}[plain]
+\huge{Interludium: Matrixmultiplikation}
+\end{frame}
+
+
 \begin{frame}[fragile]
   \frametitle{Matrizen}
   \framesubtitle{\"Ubungen}
@@ -673,6 +678,16 @@
   \end{enumerate}
 \end{frame}
 
+\begin{frame}
+\frametitle{Matrizen}
+\framesubtitle{Nachtrag Indexierung}
+Alternativ zum ``subscript indexing'' koennen die Elemente von Matrizen auch linear addressiert werden.
+ \begin{figure}
+    \centering
+    \includegraphics[width=0.75\columnwidth]{./images/matrixLinearIndexing}
+  \end{figure}
+\end{frame}
+
 
 \begin{frame}[plain]
   \huge{3. Boolesche Operationen}