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math.CO2005
An Orlik-Solomon type algebra for matroids with a fixed linear class of circuits
Raul Cordovil, David Forge
A family C of circuits of a matroid M is a linear class if, given a modular pair of circuits in C}, any circuit contained in the union of the pair is also in C. The pair (M,C) can…
math.CO2005
Kalai orientations on matroid polytopes
Raul Cordovil
Let P a polytope and let G(P) be the graph of P. Following Gil Kalai, we say that an acyclic orientation O of G(P) is good if, for every non-empty face F of P, the induced graph G(…