Modular perverse sheaves on flag varieties III: Positivity conditions

Achar, Pramod; Riche, Simon

doi:10.1090/tran/6952

Modular perverse sheaves on flag varieties III: Positivity conditions
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by Pramod N. Achar and Simon Riche PDF

Trans. Amer. Math. Soc. 370 (2018), 447-485 Request permission

Abstract:

We further develop the general theory of the “mixed modular derived category” introduced by the authors in a previous paper in this series. We then use it to study positivity and $Q$-Koszulity phenomena on flag varieties.

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