3 vertices of polyhedron
0 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 = 0 (polyhedron is polytope)

dehomogenization:
0 0 1 

grading:
1 1 0 


module rank = 3
multiplicity = 3

***********************************************************************

3 vertices of polyhedron:
 1 1 1
 1 2 1
 2 1 1

0 extreme rays of recession cone:

3 support hyperplanes of polyhedron (homogenized):
 -1 -1  3
  0  1 -1
  1  0 -1

