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Puzzles, Gromov-Witten invariants, and equivariant cohomology of two-step flag varieties

Anders Buch
(Rutgers University)
Algebraseminar
Mandag, 10 august, 2015, at 15:15-16:00, in Aud. D4 (1531-219)
Abstrakt:
I will speak about a proof of my conjectured puzzle formula for the equivariant Schubert structure constants of two-step flag varieties. This formula generalizes Knutson and Tao's puzzle rule for the equivariant cohomology of Grassmannians, as well as the cohomological puzzle rule for two-step flag varieties that was originally conjectured by Knutson.  Thanks to the equivariant version of the `quantum equals classical' result, my formula specializes to a Littlewood-Richardson rule for the equivariant quantum cohomology ofGrassmannians.


Kontaktperson: Niels Lauritzen