-- -*- M2-comint -*- hash: 9575763821107238264

i1 : convexHull matrix {{1,1,0,0},{1,0,1,0}}

o1 = {ambient dimension => 2           }
      dimension of lineality space => 0
      dimension of polyhedron => 2
      number of facets => 4
      number of rays => 0
      number of vertices => 4

o1 : Polyhedron

i2 : posHull matrix {{1,2},{2,1}}

o2 = {ambient dimension => 2           }
      dimension of lineality space => 0
      dimension of the cone => 2
      number of facets => 2
      number of rays => 2

o2 : Cone

i3 : hirzebruch 3

o3 = {ambient dimension => 2         }
      number of generating cones => 4
      number of rays => 4
      top dimension of the cones => 2

o3 : Fan

i4 : 
