- directProduct(Cone,Cone) -- computes the direct product of polyhedra and cones
- "directProduct(Cone,Polyhedron)" -- see directProduct(Cone,Cone) -- computes the direct product of polyhedra and cones
- "directProduct(Polyhedron,Cone)" -- see directProduct(Cone,Cone) -- computes the direct product of polyhedra and cones
- "directProduct(Polyhedron,Polyhedron)" -- see directProduct(Cone,Cone) -- computes the direct product of polyhedra and cones
- directProduct(Fan,Fan) -- computes the direct product of two fans

The object directProduct is a method function.