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arXiv 0710.2143math.QAmath.RA
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$U_q(\frak{sl}_{n+1}).$中的右余理想子代数

Right coideal subalgebras in $U_q(\frak{sl}_{n+1}).$

V. Kharchenko, A. V. Lara Sagahon

摘要:

我们给出了量子群$U_q(\mathfrak{sl}_{n+1})$的多参数版本的右共理想子代数的一个完全分类,其中包含所有类群元素,只要主参数$q$不是1的根。因此,在这方面,我们确定,对于所有组的组$G$的每个子组$Σ$,量子Borel子代数$U_q^+ (\mathfrak{sl}_{n+1})$包含$(n+1)!$不同的齐次右共理想子代数$U$使得$U\cap G=Σ.$如果$q$具有有限乘法阶$t>2,$,则该分类对于Lusztig量子群$u_q (\frak{sl}_{n+1}).$的多参数版本的齐次右共理想子代数仍然有效。考虑Kac-Moody代数的量化为特征Hopf代数[V.K. Kharchenko,李代数量化的组合方法,太平洋数学杂志,203(1)(2002),191- 233]。

英文摘要:

We offer a complete classification of right coideal subalgebras which contain all group-like elements for the multiparameter version of the quantum group $U_q(\mathfrak{sl}_{n+1})$ provided that the main parameter $q$ is not a root of 1. As a consequence, we determine that for each subgroup $Σ$ of the group $G$ of all group-like elements the quantum Borel subalgebra $U_q^+ (\mathfrak{sl}_{n+1})$ containes $(n+1)!$ different homogeneous right coideal subalgebras $U$ such that $U\cap G=Σ.$ If $q$ has a finite multiplicative order $t>2,$ the classification remains valid for homogeneous right coideal subalgebras of the multiparameter version of the Lusztig quantum group $u_q (\frak{sl}_{n+1}).$ In the paper we consider the quantifications of Kac-Moody algebras as character Hopf algebras [V.K. Kharchenko, A combinatorial approach to the quantifications of Lie algebras, Pacific J. Math., 203(1)(2002), 191- 233].

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