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arXiv 2104.08714math.RT
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镜像扭曲Heisenberg-Virasoro代数的张量积权模

Tensor product weight modules for the mirror-twisted Heisenberg-Virasoro algebra

Dongfang Gao, Kaiming Zhao

摘要:

本文研究镜像扭Heisenberg-Virasoro代数$\mathcal{D}$上具有无穷维权空间的不可约权模.更确切地说,利用“移位技巧”,确定了$\mathcal{D}$上最高权不可约模与中间级数不可约模的张量积为不可约的充要条件.这导致一族新的$\mathcal{D}$上的不可约权模。然后我们得到任何两个这样的张量积是同构的当且仅当相应的最高权模和中间系列的模分别是同构的。讨论了非不可约的张量积模的子模。

英文摘要:

In this paper, we study irreducible weight modules with infinite dimensional weight spaces over the mirror-twisted Heisenberg-Virasoro algebra $\mathcal{D}$. More precisely, the necessary and sufficient conditions for the tensor products of irreducible highest weight modules and irreducible modules of intermediates series over $\mathcal{D}$ to be irreducible are determined by using "shifting technique". This leads to a family of new irreducible weight modules over $\mathcal{D}$. Then we obtain that any two such tensor products are isomorphic if and only if the corresponding highest weight modules and modules of intermediate series are isomorphic respectively. Also we discuss submodules of the tensor product module when it is not irreducible.

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