Algebraic Combinatorics Seminar - Nick EarlyExport this event to calendar

Thursday, November 14, 2019 — 3:00 PM EST

Title: From weakly separated collections to matroid subdivisions

Speaker: Nick Early
Affiliation: Perimeter Institute for Theoretical Physics
Room: MC 5417

Abstract:

We study arrangements of slightly skewed tropical hyperplanes, called blades, on the vertices of a hypersimplex $\Delta_{k,n}$. We reformulate the condition under which such an arrangement induces a matroid (in fact a positroid) subdivision as the requirement that the collection of vertices defines a weakly separated collection of k-element subsets, in the sense of the work of Leclerc and Zelevinsky on quasicommuting families of quantum minor.

This talk is based on 1910.11522 and 1810.0324.

Location 
MC - Mathematics & Computer Building
5417
200 University Avenue West

Waterloo, ON N2L 3G1
Canada

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