Pavel Galashin, Steven N. Karp, Thomas Lam
Published 2017-07-07Version 1
We prove that three spaces of importance in topological combinatorics are homeomorphic to closed balls: the totally nonnegative Grassmannian, the compactification of the space of electrical networks, and the cyclically symmetric amplituhedron.
Combinatorial formulas for Le-coordinates in a totally nonnegative Grassmannian
Totally nonnegative Grassmannian and Grassmann polytopes
Variations on a theme of Kasteleyn, with application to the totally nonnegative Grassmannian
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