Hi,
is there any method (at best implemented in Polymake) that, given two polytopes P,Q, checks whether there exists an affine linear map pi with P = pi(Q)?
Very nice - I will start working on them as soon as I'm done with lots of other things! Thank you for the effort.Now multigraphs are implemented; ...
Then I have a problem indeed - without parallel edges not all matroid decompositions for the TU test extension may be displayed correctly.Loops are allowed, but not parallel edges.Does graph::Graph allow parallel edges and loops?