lt="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval6.png">), each column contains the value of <tt>function_name</tt>
            in the corresponding set,
            <tt>feasible = true</tt>,
            <tt>idx</tt> = <img src="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval7.png" alt="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval7.png"> vector of indices of polyhedra which contain <tt>x</tt>,
            <tt>tb_value = []</tt>.
        </li>
   