Unicity of graded covers of the Category mathcal O of Bernstein-Gelfand-Gelfand
classification
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keywords
bernstein-gelfand-gelfandcategorygradedmathcalactionalgebracentercharacterized
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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.
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