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math.AG2025
PrIncipal quiver Grassmannians: conjectures
Stanislav Fedotov, Evgeny Feigin
Let and be a projective and an injective representations of a Dynkin quiver. We consider quiver Grassmannians of subrepresentations of dimension inside representat…
math.AG2025
Global positroid varieties
Evgeny Feigin
Positroid subvarieties of complex Grassmannians are the images of the Richardson subvarieties of the full flag varieties under the natural projection map. Positroid varieties admit…