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arXiv 1202.6097math.RT
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W-代数上有限维不可约模的分类

Classification of finite dimensional irreducible modules over W-algebras

Ivan Losev, Victor Ostrik

摘要:

有限W-代数是李理论中的一类结合代数。每个W-代数由一对半单李代数g(我们的基域是代数闭的且特征为0)和它的幂零元e构成。本文对W-代数上具有整中心特征标的有限维不可约模进行了分类。更详细地说,在前一篇论文中,第一作者证明了所考虑的幂零元元的中心化子的分量群A(e)作用于W-代数上的有限维不可约模的集合,其商集自然地与U(g)中的本原理想的集合相同,U(g)中的本原理想的相关变种是e的伴随轨道的闭包。本文对给定的具有积分中心特征标的本原理想,计算了相应的A(e)-轨道。答案是,该轨道的稳定子基本上是由G引入的A(e)的子群。卢斯蒂格在证明中,我们使用了各种不同的成分:结构理论的本原理想和Harish-Chandra双模的半单李代数,表示论的W-代数,结构理论的细胞和Springer表示,和多融合幺半范畴范畴。

英文摘要:

Finite W-algebras are certain associative algebras arising in Lie theory. Each W-algebra is constructed from a pair of a semisimple Lie algebra g (our base field is algebraically closed and of characteristic 0) and its nilpotent element e. In this paper we classify finite dimensional irreducible modules with integral central character over W-algebras. In more detail, in a previous paper the first author proved that the component group A(e) of the centralizer of the nilpotent element under consideration acts on the set of finite dimensional irreducible modules over the W-algebra and the quotient set is naturally identified with the set of primitive ideals in U(g) whose associated variety is the closure of the adjoint orbit of e. In this paper for a given primitive ideal with integral central character we compute the corresponding A(e)-orbit. The answer is that the stabilizer of that orbit is basically a subgroup of A(e) introduced by G. Lusztig. In the proof we use a variety of different ingredients: the structure theory of primitive ideals and Harish-Chandra bimodules of semisimple Lie algebras, the representation theory of W-algebras, the structure theory of cells and Springer representations, and multi-fusion monoidal categories.

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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