4 papers
Two dimensional versions of the affine Grassmannian and their geometric description
Andrea Maffei, Valerio Melani, Gabriele Vezzosi
For a smooth affine algebraic group over an algebraically closed field, we consider several two-variables generalizations of the affine Grassmannian , gi…
Tate modules as condensed modules
Valerio Melani, Hugo Pourcelot, Gabriele Vezzosi
We prove that the category of countable Tate modules over an arbitrary discrete ring embeds fully faithfully into that of condensed modules. If the base ring is of finite type, we…
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…
A flag version of Beilinson-Drinfeld Grassmannian for surfaces
Benjamin Hennion, Valerio Melani, Gabriele Vezzosi
In this paper we define and study a generalization of the Belinson-Drinfeld Grassmannian to the case where the curve is replaced by a smooth projective surface , and the trivial…