New representations of affine Kac-Moody algebras

New representations of affine Kac-Moody algebras
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仿射 Kac-Moody 代数的新表示

DOI:
10.1016/j.jalgebra.2019.11.014
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发表时间:
2020
期刊:
影响因子:
0.9
通讯作者:
Kaiming Zhao
Kaiming Zhao
中科院分区:
数学3区
文献类型:
--
作者:
Yan-An Cai;Haijun Tan;Kaiming Zhao

文献摘要

相似文献

设h是仿射Kac-Moody代数的不含中心的Cartan子代数。本文对所有仿射Kac-Moody代数的秩为1的自由U(h_∞)-模进行了模结构的分类.这些模只存在于A1(1)(l≥ 1)或C1(1)(l≥ 2)型仿射Kac-Moody代数中,它们一般是无权的单模.因此,我们得到了这类仿射Kac-Moody代数上的一类新的单模。
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.