vertexEdgeMatrix computes the matrix M where the columns are indexed by the edges and the rows are indexed by the vertices of P and has 1 as an entry if the corresponding edge contains this vertex and 0 otherwise.
i1 : P = cyclicPolytope(3,5) o1 = {ambient dimension => 3 } dimension of lineality space => 0 dimension of polyhedron => 3 number of facets => 6 number of rays => 0 number of vertices => 5 o1 : Polyhedron |
i2 : vertexEdgeMatrix P o2 = | 0 1 2 3 4 5 6 7 8 9 | | 1 1 0 1 1 0 0 1 0 0 | | 2 0 1 1 0 0 0 0 0 1 | | 3 1 1 0 0 1 0 0 1 0 | | 4 0 0 0 1 1 1 0 0 0 | | 5 0 0 0 0 0 1 1 1 1 | 6 10 o2 : Matrix ZZ <--- ZZ |
The object vertexEdgeMatrix is a method function.