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arXiv 1003.2332math.RTmath.RA
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由交换子代数导出的挠理论

Torsion theories induced from commutative subalgebras

Vyacheslav Futorny, Serge Ovsienko, Manuel Saorin

摘要:

我们开始研究一个域上一类重要的结合代数的表示的挠理论,该域包括所有A型有限W-代数,特别是gl(n)(或sl(n))的泛包络代数。如果U是包含一个可交换生成子代数A的代数,则证明了任何由素理想的余高定义的A-挠理论都可提升到U。此外,对任意单U-模M,M在Spec A中的所有相伴素理想都有相同的余高。因此,A的相伴素理想的余高是给定的单U-模的不变量。这意味着由A的相伴素理想的余高控制的$U$ -模范畴的分层。我们的方法可以被看作是R.Block的经典论文的推广,它特别允许研究gl(n)的表示超出经典的权或广义权模范畴。

英文摘要:

We begin a study of torsion theories for representations of an important class of associative algebras over a field which includes all finite W-algebras of type A, in particular the universal enveloping algebra of gl(n) (or sl(n)) for all n. If U is such and algebra which contains a finitely generated commutative subalgebra A, then we show that any A-torsion theory defined by the coheight of prime ideals is liftable to U. Moreover, for any simple U-module M, all associated prime ideals of M in Spec A have the same coheight. Hence,thecoheight of the associated prime ideals of A is an invariant of a given simple U-module. This implies a stratification of the category of $U$-modules controlled by the coheight of associated prime ideals of A. Our approach can be viewed as a generalization of the classical paper by R.Block, it allows in particular to study representations of gl(n) beyond the classical category of weight or generalized weight modules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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