Unicity of graded covers of the Category of Bernstein-Gelfand-Gelfand
arXiv:1402.1273 · doi:10.1007/s11512-014-0211-x
Abstract
We show that the standard graded cover of the well-known category of Bernstein-Gelfand-Gelfand can be characterized by its compatibility with the action of the center of the enveloping algebra.
13 pages