Thomas Lam "A decade of positroid varieties" (part1)
Channel: Schubert Seminar
Date: 2023-09-18

Title: A decade of positroid varieties
Abstract: Positroid varieties are intersections of cyclically rotated Schubert varieties in the Grassmannian.  They show up in many contexts: Schubert calculus, total positivity, mirror symmetry, positive geometry, cluster structures, Catalan theory, and so on. I'll give a broad survey of some things we've learnt about positroid varieties in the last ten years (with a bias towards my own work), and some things we still don't know.