39 citations · 124 across the 14 of their papers we have counts for
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math.CO2007★ 3 cited
Total positivity for cominuscule Grassmannians
Thomas Lam, Lauren Williams
In this paper we explore the combinatorics of the non-negative part (G/P)+ of a cominuscule Grassmannian. For each such Grassmannian we define Le-diagrams -- certain fillings of ge…
math.AG2007★ 39 cited
Matching polytopes, toric geometry, and the non-negative part of the Grassmannian
Alexander Postnikov, David Speyer, Lauren Williams
In this paper we use toric geometry to investigate the topology of the totally non-negative part of the Grassmannian (Gr_{kn})_{\geq 0}. This is a cell complex whose cells Delta_G…