GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
2 module generators 0 Hilbert basis elements of recession monoid 2 vertices of polyhedron 0 extreme rays of recession cone 2 support hyperplanes of polyhedron (homogenized) embedding dimension = 3 affine dimension of the polyhedron = 2 (maximal) rank of recession monoid = 1 dimension of maximal subspace = 1 dehomogenization: 0 0 1 grading: 1 0 0 module rank = 2 multiplicity = 2 *********************************************************************** 2 module generators: 0 0 1 1 0 1 0 Hilbert basis elements of recession monoid: 2 vertices of polyhedron: -1 0 2 3 0 2 0 extreme rays of recession cone: 1 basis elements of maximal subspace: 0 1 0 2 support hyperplanes of polyhedron (homogenized): -2 0 3 2 0 1