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math.RT2012
Jantzen sum formula for restricted Verma modules over affine Kac-Moody algebras at the critical level
Johannes Kübel
For a restricted Verma module of an affine Kac-Moody algebra at the critical level we describe the Jantzen filtration and give an alternating sum formula which corresponds to the J…
math.RT2012
Tilting modules in category O and sheaves on moment graphs
Johannes Kübel
We describe tilting modules of the deformed category O over a semisimple Lie algebra as certain sheaves on a moment graph associated to the corresponding block of category O. We pr…