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