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math.RT2017
A non-perverse Soergel bimodule in type A
Nicolas Libedinsky, Geordie Williamson
A basic question concerning indecomposable Soergel bimodules is to understand their endomorphism rings. In characteristic zero all degree-zero endomorphisms are isomorphisms (a fac…
math.RT2017
Koszul duality for Kac-Moody groups and characters of tilting modules
Pramod Achar, Shotaro Makisumi, Simon Riche +1
We establish a character formula for indecomposable tilting modules for connected reductive groups in characteristic p in terms of p-Kazhdan-Lusztig polynomials, for p>h the Coxete…