Tests if a Cone is pointed, i.e. the lineality space is 0. A Fan is pointed if one of its Cones is pointed. This is equivalent to all Cones being pointed.
i1 : C = intersection(matrix{{1,1,-1},{-1,-1,-1}}) o1 = {ambient dimension => 3 } dimension of lineality space => 1 dimension of the cone => 3 number of facets => 2 number of rays => 2 o1 : Cone |
i2 : isPointed C o2 = false |
i3 : C = intersection{C,(matrix{{1,-1,-1}},0)} o3 = {ambient dimension => 3 } dimension of lineality space => 0 dimension of the cone => 3 number of facets => 3 number of rays => 3 o3 : Cone |
i4 : isPointed C o4 = true |
The object isPointed is a method function.