90 citations · 418 across the 58 of their papers we have counts for
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Symmetric Dellac configurations
Ange Bigeni, Evgeny Feigin
We define symmetric Dellac configurations as the Dellac configurations that are symmetric with respect to their centers. The symmetric Dellac configurations whose lengths are even…
Symmetric Dellac configurations and symplectic/orthogonal flag varieties
Ange Bigeni, Evgeny Feigin
The goal of this paper is to study the link between the topology of the degenerate flag varieties and combinatorics of the Dellac configurations. We define three new classes of alg…
Vertices of FFLV polytopes
Evgeny Feigin, Igor Makhlin
FFLV polytopes describe monomial bases in irreducible representations of and . We study various sets of vertices of FFLV polytopes. First, we…
The median Genocchi numbers, Q-analogues and continued fractions
Evgeny Feigin
The goal of this paper is twofold. First, we review the recently developed geometric approach to the combinatorics of the median Genocchi numbers. The Genocchi numbers appear in th…