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Department of Applied Mathematics and Theoretical Physics

Let Gr(k,n) be the Grassmannian of k-planes in C^n. The standard torus action on C^n induces a torus action on Gr(k,n), whose orbits encode interesting combinatorial and geometric invariants. I will discuss explicit degenerations of the generic torus orbit closure into a union of Richardson varieties, and a further degeneration in the union of Schubert varieties. These give new proofs of cohomological formulas of Berget-Fink and Klyachko, respectively. I will speculate about where to go from here.

Further information

Time:

10Jun
Jun 10th 2026
14:15 to 15:15

Venue:

MR14 (tbc)

Series:

Algebraic Geometry Seminar