GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
2 vertices of polyhedron 0 extreme rays of recession cone 2 support hyperplanes of polyhedron (homogenized) embedding dimension = 3 affine dimension of the polyhedron = 1 rank of recession monoid = 0 internal index = 1 *********************************************************************** 2 vertices of polyhedron: 0 5 1 5 0 1 0 extreme rays of recession cone: 2 support hyperplanes of polyhedron (homogenized): 0 1 0 1 0 0 1 equations: 1 1 -5 2 basis elements of lattice: 1 -1 0 0 5 1