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math.AG2022
Fixed points under pinning-preserving automorphisms of reductive group schemes
Pramod N. Achar, João Lourenço, Timo Richarz +1
In this paper we determine the scheme-theoretic fixed points of pinned reductive group schemes acted upon by a group of pinning-preserving automorphisms. The results are used in a…
math.RT2022★ 4 cited
Modular affine Hecke category and regular centralizer
Roman Bezrukavnikov, Simon Riche
In this paper we provide a "combinatorial" description of the category of tilting perverse sheaves on the affine flag variety of a reductive algebraic group, and its free-monodromi…
math.RT2022
A geometric model for blocks of Frobenius kernels
Pramod N. Achar, Simon Riche
Building on a geometric counterpart of Steinberg's tensor product formula for simple representations of a connected reductive algebraic group over a field of positive character…