\begin{exampleblock}{}

\begin{itemize}
\item Our Prototype: confirmation of convergence 
of mixed  asynchronous  iterations  with   uniform  delays
\item Mixed iterations with  
  $SCC(1)=\{1,2\}$, 
  $SCC(3)=\{3\}$ and $SCC(4)=\{4,5\}$
\begin{center}
  \includegraphics[width=2.5cm]{../xpl_iteration_final.ps}
\end{center}
\end{itemize}
\end{exampleblock}