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arXiv 1004.0732math.RTmath-phmath.MP
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约化对称超对的Harish-Chandra同构

The Harish-Chandra isomorphism for reductive symmetric superpairs

Alexander Alldridge

摘要:

考虑偶型强约化李超代数的对称对,引入分次Harish-Chandra同态。我们证明了它的像是Cartan子空间上Weyl不变量的某个显式滤子代数,其关联分次是Chevalley限制映射在对称不变量上的像。这推广了Harish-Chandra和V. Kac,M.戈列利克

英文摘要:

We consider symmetric pairs of Lie superalgebras which are strongly reductive and of even type, and introduce a graded Harish-Chandra homomorphism. We prove that its image is a certain explicit filtered subalgebra of the Weyl invariants on a Cartan subspace whose associated graded is the image of Chevalley's restriction map on symmetric invariants. This generalises results of Harish-Chandra and V. Kac, M. Gorelik.

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