Description
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
