Subquotient categories of the affine category $O$ at the critical level

Peter Fiebig
Universität Erlangen-Nürnberg, Germany

$Subquotient categories of the affine category $\mathcal O$ at the critical level cover$

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Abstract

We introduce subquotient categories of the restricted category $O$ over an affine Kac–Moody algebra at the critical level and show that some of them have a realization in terms of moment graph sheaves.