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math.MG2001
A generalization of Filliman duality
Greg Kuperberg
Filliman duality expresses (the characteristic measure of) a convex polytope P containing the origin as an alternating sum of simplices that share supporting hyperplanes with P. Th…
math.CO2001
Kasteleyn cokernels
Greg Kuperberg
We consider Kasteleyn and Kasteleyn-Percus matrices, which arise in enumerating matchings of planar graphs, up to matrix operations on their rows and columns. If such a matrix is d…