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arXiv 2102.00979math.RT
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$A_1$型仿射Virasoro代数上的不可约张量积模

Irreducible tensor product modules over the affine-Virasoro algebra of type $A_1$

Qiu-Fan Chen, Yu-Feng Yao

摘要:

本文通过对[Q.]中定义的不可约元的张量积构造了$A_1$型仿射Virasoro代数上的一类非权模. Chen,J. Han,Non-weight modules over the affine-Virasoro algebra of type $A_1$,J. Math. Phys. 60,071707(2019)] with irreduced最高权modules.确定了这些模的不可约性和同构类。此外,我们还证明了这些张量积模不同于已知的非权模。最后,我们从$A_1$型仿射Virasoro代数的某些子代数上的模实现了某些张量积模作为诱导模,并给出了这些诱导模可约的充分和必要条件.

英文摘要:

In this paper, we construct a class of non-weight modules over the affine-Virasoro algebra of type $A_1$ by taking tensor products of irreducibles defined in [Q. Chen, J. Han, Non-weight modules over the affine-Virasoro algebra of type $A_1$, J. Math. Phys. 60, 071707 (2019)] with irreducible highest weight modules. The irreducibility and the isomorphism classes of these modules are determined. Moreover, we show that these tensor product modules are different from the known non-weight modules. Finally, we realize some tensor product modules as induced modules from modules over certain subalgebras of the affine-Virasoro algebra of type $A_1$, and give sufficient and necessary conditions for these induced modules to be reducible.

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