<div class="descF_item">On a :
<div class="math">\(M = \left( \begin{matrix} 
-1 & 1 & 1 & 0\\
-1 & 2 & 0 & 1 \end{matrix}  \right),\; c^* = \left( \begin{matrix} 1 & 1 & 0 & 0\end{matrix}  \right) 
\mbox{ et }b = \left( \begin{matrix}  1\\ 4 \end{matrix}  \right).\)</div>
</div>