New representations of affine Kac-Moody algebras
New representations of affine Kac-Moody algebras
复制标题
仿射 Kac-Moody 代数的新表示
DOI:
10.1016/j.jalgebra.2019.11.014
复制
发表时间:
2020
影响因子:
0.9
通讯作者:
Kaiming Zhao
中科院分区:
文献类型:
--
作者:
Yan-An Cai;Haijun Tan;Kaiming Zhao
Let h˜ be a Cartan subalgebra of an affine Kac-Moody algebra without containing the center. In this paper, we classify the module structures on U (h˜) for all affine Kac-Moody algebras which are free U (h˜)-modules of rank 1. These modules exist only for type A l (1)(l≥ 1) or C l (1)(l≥ 2) affine Kac-Moody algebras, they are generically non-weight and simple. Hence, we obtain a class of new simple modules over these affine Kac-Moody algebras.