info:eu-repo/semantics/article
Mixed Perverse Sheaves on Flag Varieties for Coxeter Groups
Fecha
2020-02-09Registro en:
Achar, Pramod N.; Riche, Simon; Vay, Cristian Damian; Mixed Perverse Sheaves on Flag Varieties for Coxeter Groups; Canadian Mathematical Soc; Canadian Journal Of Mathematics; 72; 1; 9-2-2020; 1-55
0008-414X
1496-4279
CONICET Digital
CONICET
Autor
Achar, Pramod N.
Riche, Simon
Vay, Cristian Damian
Resumen
In this paper we construct an abelian category of mixed perverse sheaves attached to any realization of a Coxeter group, in terms of the associated Elias-Williamson diagrammatic category. This construction extends previous work of the first two authors, where we worked with parity complexes instead of diagrams, and we extend most of the properties known in this case to the general setting. As an application we prove that the split Grothendieck group of the Elias-Williamson diagrammatic category is isomorphic to the corresponding Hecke algebra, for any choice of realization.