vertexFacetMatrix computes the matrix M where the columns are indexed by the facets and the rows are indexed by the vertices of P and has 1 as an entry if the corresponding facet contains this vertex and 0 otherwise.
i1 : P = cyclicPolytope(3,5) o1 = P o1 : Polyhedron |
i2 : vertexFacetMatrix P o2 = | 0 1 2 3 4 5 6 | | 1 1 1 1 0 0 1 | | 2 1 0 0 0 1 1 | | 3 1 1 0 1 1 0 | | 4 0 1 1 1 0 0 | | 5 0 0 1 1 1 1 | 6 7 o2 : Matrix ZZ <--- ZZ |
The object vertexFacetMatrix is a method function.