The classification of blocks in BGG category O

The classification of blocks in BGG category O
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BGG类别O中块的分类

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通讯作者:
J. Blais
J. Blais
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作者:
L. Tran;P. Drogui;G. Mercier;J. Blais

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本文对约化李代数的BGG范畴O中作为块出现的不可分解交换范畴之间的等价进行了分类。我们的分类意味着O范畴中的块只依赖于Weyl群的相关抛物商的Bruhat阶。作为证明的一部分,我们观察到任何具有简单保持对偶的有限维代数至多允许一个拟遗传结构。
We classify all equivalences between the indecomposable abelian categories which appear as blocks in BGG category O for reductive Lie algebras. Our classification implies that a block in category O only depends on the Bruhat order of the relevant parabolic quotient of the Weyl group. As part of the proof, we observe that any finite dimensional algebra with simple preserving duality admits at most one quasi-hereditary structure.