   <tt>fval</tt> = <img src="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval4.png" alt="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval4.png"> matrix of function values (<img src="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval5.png" alt="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval5.png"> denotes the number of
            polyhedra which contain <img src="../../../../../../fig/mpt/modules/geometry/unions/@PolyUnion/feval6.png" a