Centers for the restricted category O at the critical level over affine Kac-Moody algebras
arXiv:1301.6016
Abstract
The restricted category O at the critical level over an affine Kac-Moody algebra is a certain subcategory of the ordinary BGG-category O. We study a deformed version introduced by Arakawa and Fiebig and calculate the center of the deformed restricted category O.
21 pages. minor changes in the preliminaries