tt>, where <img src="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval2.png" alt="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval2.png"> is the range of the function,
            <tt>feasible = false</tt>,
            <tt>idx = [] </tt>,
            <tt>tb_value = []</tt>.
        </li>
        
         <li>
            
            <tt>x</tt> is in a single polyhedron:
            
            <tt>fval</tt> = <img src="../../../../../../fig/mpt/modules/geometry/unions/@