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October 23, 2024
Wednesday, October 23
Geometry and Topology
Time: 15:30
Speaker: Tao Gong (Western)
Title: "Homotopy Types of Quotients of Toric varieties from Weyl Groups"
Room: MC 107

Abstract: Given a reduced crystallographic root system with a fixed simple system, it is associated to a Weyl group W and a polytope P which is the convex hull of the W-orbit of a dominant weight. P and P/W are polytopes, associated with complex toric varieties XP and XP/W respectively. We will see a homotopy equivalence between XP/W and XP/W, and contractibility of the real real points XRP/W for small ranks.