44 citations · 64 across the 17 of their papers we have counts for
21 papers
The semi-infinite cohomology of Weyl modules with two singular points
Giorgia Fortuna, Davide Lombardo, Andrea Maffei +1
In their study of spherical representations of an affine Lie algebra at the critical level and of unramified opers, Frenkel and Gaitsgory introduced what they called the Weyl modul…
Paving Springer fibers for E7
Corrado De Concini, Andrea Maffei
The purpose of this paper is to show that, for each unipotent element in type E7, the corresponding Springer fiber can be paved by affine spaces.
Local opers with two singularities: the case of
Giorgia Fortuna, Davide Lombardo, Andrea Maffei +1
We study local opers with two singularities for the case of the Lie algebra sl(2), and discuss their connection with a two-variables extension of the affine Lie algebra. We prove a…
A remark on the Mayer-Vietoris double complex for singular cohomology
Roberto Frigerio, Andrea Maffei
Given an open cover of a paracompact topological space X, there are two natural ways to construct a map from the cohomology of the nerve of the cover to the cohomology of X. One of…
The Bruhat order on abelian ideals of Borel subalgebras
Jacopo Gandini, Andrea Maffei, Pierluigi Moseneder Frajria +1
Let G be a quasi simple algebraic group over an algebraically closed field k whose characteristic is not very bad for G, and let B be a Borel subgroup of G with Lie algebra b. Give…
Abelian varieties as automorphism groups of smooth projective varieties
Davide Lombardo, Andrea Maffei
We determine which complex abelian varieties can be realized as the automorphism group of a smooth projective variety.