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math.CO2018★ 1 cited
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…
math.CO2018
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…