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Transformation groups 2017. Conference dedicated to Prof. Ernest B. Vinberg on the occasion of his 80th birthday
14 декабря 2017 г. 16:50, г. Москва, НМУ (Большой Власьевский переулок, д. 11), к. 401


Weighted PBW degenerations and Vinberg's polytopes

E. Feiginab

a Skoltech, Russia
b HSE, Russia



Аннотация: We study algebraic, combinatorial and geometric aspects of weighted PBW-type degenerations of flag varieties in type A. These degenerations are labeled by degree functions lying in an explicitly defined polyhedral cone. Varying the degree function in the cone, we recover the classical flag variety, its abelian PBW degeneration and toric degeneration corresponding to Vinberg's polytopes. We also identify the cone of degree functions with a maximal cone in the tropical flag variety. The talk is based on the joint work with Xin Fang, Ghislain Fourier and Igor Makhlin.

Язык доклада: английский


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