Classes & TalksWednesday, December 9

: Graded Ehrhart theory of unimodular zonotopes

Name: : Graded Ehrhart theory of unimodular zonotopes
Start: 2026-12-10T00:00:00.000Z
End: 2026-12-10T01:00:00.000Z
Location: PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335974

Wednesday, December 9 · 4-5 p.m. · PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335974

4-5 p.m.

When: Wednesday, December 9 · 4-5 p.m.
Where: PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335974

The event’s page Add to my calendar Open in Maps

About this event

Speaker: Ethan Partida, Brown University

Abstract:Graded Ehrhart theory is a new q-analogue of Ehrhart theory introduced by Reiner and Rhoades. Roughly, it is the study of how a canonical, graded lattice point count of a polytope behaves under dilations. The grading in this count is constructed via the orbit harmonics method. In this talk, I will discuss the graded Ehrhart theory of unimodular zonotopes and its connections to matroid theory. In particular, I will explain why graded lattice point counts of unimodular zonotopes are q-integer evaluations of Tutte polynomials and how arrangement Schubert varieties can be used to study the harmonic algebras of unimodular zonotopes. This talk is based on joint work with Colin Crowley.Note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974

Listed by University of Washington (ICS feeds), gathered by the Seattle events calendar.