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math.AG2025
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…
math.AG2022
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…