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math.RT2026
Base change and the Mackey formula in Deligne--Lusztig theory
Sean Cotner
Using ideas of Digne and recent work of Gaitsgory--Rozenblyum--Varshavsky, we show that Lusztig induction commutes with (a minor variant of) the Glauberman correspondence for large…
math.RT2026
Central isogenies and conjugacy classes in reductive groups
Sean Cotner
Steinberg described the group of components of the centralizer of a semisimple element of a connected semisimple algebraic group as a subgroup of the fundamental group of .…