Speaker: Thomas Martinez, UCLA/Cornell
Title: The Combinatorics of Affine Deodhar Diagrams
Time: 2:30 PM, Monday, February 9, 2026
Place: Malott 206 or ZOOM

Abstract: Deodhar diagrams (also known as Go diagrams) have been studied due to their relation to the totally non-negative Grassmannian and positroid varieties. In this talk, we introduce affine Deodhar diagrams and study combinatorial moves of these diagrams. We provide geometric analogues of our combinatorial moves, discussing the relationship to (affine patches of) positroid varieties and their cluster structure.


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