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Irreducible jet modules for the vector field Lie algebra on S 1 × C
Communications in Algebra ( IF 0.6 ) Pub Date : 2021-01-06
Mengnan Niu, Genqiang Liu

Abstract

For a commutative algebra A over C , denote g = Der ( A ) . A module over the smash product A # U ( g ) is called a jet g -module, where U ( g ) is the universal enveloping algebra of g . In the present paper, we study jet modules in the case of A = C [ t 1 ± 1 , t 2 ] . We show that A # U ( g ) D U ( L ) , where D is the Weyl algebra C [ t 1 ± 1 , t 2 , t 1 , t 2 ] , and L is a Lie subalgebra of A # U ( g ) called the jet Lie algebra corresponding to g . Using a Lie algebra isomorphism θ : L m 1 , 0 Δ , where m 1 , 0 Δ is the subalgebra of vector fields vanishing at the point (1, 0), we show that any irreducible finite dimensional L-module is isomorphic to an irreducible g l 2 -module. As an application, we give tensor product realizations of irreducible jet modules over g with uniformly bounded weight spaces.



中文翻译:

S 1×C上向量场李代数的不可约射流模块

摘要

对于交换代数A over C 表示 G = er 一种 粉碎产品上的模块 一种 ü G 被称为喷气机 G -模块,在哪里 ü G 是...的通用包络代数 G 在本文中,我们研究了在以下情况下的喷射模块 一种 = C [ Ť 1个 ± 1个 Ť 2 ] 我们证明 一种 ü G d ü 大号 哪里 d 是魏尔代数 C [ Ť 1个 ± 1个 Ť 2 Ť 1个 Ť 2 ] 并且L是的李子代数 一种 ü G 称为对应的射流李代数 G 使用李代数同构 θ 大号 1个 0 Δ 哪里 1个 0 Δ 是在(1,0)点消失的矢量场的子代数,我们证明了任何不可约的有限维L-模都是不可约的同构 G 2 -模块。作为应用程序,我们给出了不可约射流模块的张量积实现 G 具有均匀界定的权重空间。

更新日期:2021-01-06
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