Quasi polymatroidal flow networks.
Quaternionic geometry of matroids
Building on a recent paper [8], here we argue that the combinatorics of matroids are intimately related to the geometry and topology of toric hyperkähler varieties. We show that just like toric varieties occupy a central role in Stanley’s proof for the necessity of McMullen’s conjecture (or g-inequalities) about the classification of face vectors of simplicial polytopes, the topology of toric hyperkähler varieties leads to new restrictions on face vectors of matroid complexes. Namely in this paper...
Quelques théorèmes de géométrie à dimensions
Quelques théorèmes sur les tétraèdres dont les arêtes opposées sont égales deux à deux, et solution de la question 1272
Quotients of Polytopes and C-Groups.