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math.AG2023
Higher nearby cycles and central sheaves on affine flag varieties
Pramod N. Achar, Simon Riche
In this paper we generalize and study a notion of (unipotent) nearby cycles over a higher dimensional base based on Beĭlinson's description of unipotent nearby cycles, following an…
math.RT2023
Koszul duality for Coxeter groups
Simon Riche, Cristian Vay
We construct a "Koszul duality" equivalence relating the (diagrammatic) Hecke category attached to a Coxeter system and a given realization to the Hecke category attached to the sa…