Abstract
We show that the standard graded cover of the well-known category $\mathcal{O}$ of Bernstein–Gelfand–Gelfand can be characterized by its compatibility with the action of the center of the enveloping algebra.
Funding Statement
Partially supported by the DFG in the framework of SPP 1388 and GK 1821.
Citation
Michael Rottmaier. Wolfgang Soergel. "Unicity of graded covers of the category $\mathcal{O}$ of Bernstein–Gelfand–Gelfand." Ark. Mat. 53 (2) 383 - 400, October 2015. https://doi.org/10.1007/s11512-014-0211-x
