-- -*- M2-comint -*- {* hash: -89747912 *} i1 : P = convexHull(matrix {{1,-1,2,-2},{1,1,2,2}}, matrix {{0},{1}}) o1 = {ambient dimension => 2 } dimension of lineality space => 0 dimension of polyhedron => 2 number of facets => 5 number of rays => 1 number of vertices => 4 o1 : Polyhedron i2 : rays P o2 = | 0 | | 1 | 2 1 o2 : Matrix QQ <--- QQ i3 : C = posHull P o3 = {ambient dimension => 2 } dimension of lineality space => 0 dimension of the cone => 2 number of facets => 2 number of rays => 2 o3 : Cone i4 : rays C o4 = | -1 1 | | 1 1 | 2 2 o4 : Matrix QQ <--- QQ i5 : F = normalFan P o5 = {ambient dimension => 2 } number of generating cones => 4 number of rays => 5 top dimension of the cones => 2 o5 : Fan i6 : rays F o6 = {| -1 |, | 1 |, | 1 |, | -1 |, | 0 |} | 0 | | 1 | | 0 | | 1 | | 1 | o6 : List i7 :