GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
1 module generators 3 Hilbert basis elements of recession monoid 1 vertices of polyhedron 2 extreme rays of recession cone 6 module generators over original monoid 3 support hyperplanes of polyhedron (homogenized) embedding dimension = 3 affine dimension of the polyhedron = 2 (maximal) rank of recession monoid = 2 internal index = 12 size of triangulation = 1 resulting sum of |det|s = 6 dehomogenization: 0 0 1 module rank = 1 *********************************************************************** 1 module generators: 1 1 1 3 Hilbert basis elements of recession monoid: -1 1 0 0 1 0 1 1 0 1 vertices of polyhedron: 1 1 1 2 extreme rays of recession cone: -1 1 0 1 1 0 6 module generators over original monoid: -1 3 1 -1 4 1 0 2 1 0 3 1 1 1 1 1 2 1 3 support hyperplanes of polyhedron (homogenized): -1 1 0 0 0 1 1 1 -2