\begin{exampleblock}{}
\begin{figure}
\subfloat[Parallèle synchrone]{
  \includegraphics[scale=0.2]{../images/eval_sync}
}

\vspace{-1em}
\subfloat[Asynchrone]{
  \includegraphics[scale=0.2]{../images/eval_async}
}

\vspace{-1em}
\subfloat[Mixte tq.\class{1} $=\{1,2\}$, \class{3} $=\{3\}$,
\class{4} $=\{4,5\}$.]{
  \includegraphics[scale=0.2]{../images/eval_mixte}
}
\caption{Graphes des itérations de $g$} 
\end{figure}
\end{exampleblock}
