Analogue of Kostant's u-cohomology formula for the general linear superalgebra

Analogue of Kostant's u-cohomology formula for the general linear superalgebra
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DOI:
10.1155/s1073792804131437
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发表时间:
2004
影响因子:
1
通讯作者:
Shun-Jen Cheng;Rui-bin Zhang
Shun-Jen Cheng;Rui-bin Zhang
中科院分区:
数学1区
文献类型:
--
作者:
Shun-Jen Cheng;Rui-bin Zhang

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我们以显式形式确定一般线性超代数 Glm|n 的上三角奇子代数 (Glm|n)+1 的李超代数上同调群,其系数位于 Glm|n 上的不可约张量模中。利用这一点,我们开发了一个用于不可约张量表示的 Weyl 型特征公式。无论是在上同调群的计算中还是在特征公式的构造中,A型无限秩仿射Kac-Moody代数的Weyl群都起着至关重要的作用。
We determine in an explicit form the Lie superalgebra cohomology groups of the upper triangular odd subalgebra (Glm|n)+1 of the general linear superalgebra Glm|n with coefficients in irreducible tensor modules over Glm|n. Using this, we develop a Weyl-type character formula for the irreducible tensor representations. Both in the computation of the cohomology groups and in the construction of the character formula, the Weyl group of the infinite-rank affine Kac-Moody algebra of A-type plays an essential role.