unction3.png">, <img src="../../../../../../fig/mpt/modules/geometry/sets/@ConvexSet/addfunction4.png" alt="../../../../../../fig/mpt/modules/geometry/sets/@ConvexSet/addfunction4.png"> 
      <pre class="programlisting"> P1 = Polyhedron(1,1); P2 = Polyhedron(-1,-1); </pre>
<pre class="programlisting"></pre> Put the polyhedra to one array. <pre class="programlisting"> P = [P1, P2]; </pre>
<pre class="programlisting"></pre> Define function <img src="../../../../../../fig/mpt/modules/geometry/sets/@ConvexSet/