4 papers · 1 filter
Truncated Grassmannians, blow-ups along Schubert varieties and collineations
Evgeny Feigin
Truncated Grassmannians are defined as closures of orbits of abelian unipotent groups acting on the degree truncations of projectivized wedge powers. We show that such truncations…
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…
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…
On reduced arc spaces of toric varieties
Ilya Dumanski, Evgeny Feigin, Ievgen Makedonskyi +1
An arc space of an affine cone over a projective toric variety is known to be non-reduced in general. It was demonstrated recently that the reduced scheme structure is worth studyi…