arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.3208math.RT
收藏

有限Coxeter群的有理Cherednik代数的不可约球面表示的支撑

Supports of irreducible spherical representations of rational Cherednik algebras of finite Coxeter groups

Pavel Etingof

摘要:

我们确定不可约球面表示的支集(即,多项式表示的不可约商)的有理Cherednik代数的有限Coxeter群的任何值的参数c。特别是,我们确定哪些值的c这个表示是有限维的。这推广了Varagnolo和Vasserot,arXiv:0705.2691的结果,他们在外尔群和相等参数的情况下对有限维球面表示进行了分类(即,当c是常数函数时)。作为一个应用,我们计算的三角函数的情况下(相等的参数)的Macdonald配对的内核的零集。我们的证明是基于Macdonald-Mehta积分和分布的基本理论。

英文摘要:

We determine the support of the irreducible spherical representation (i.e., the irreducible quotient of the polynomial representation) of the rational Cherednik algebra of a finite Coxeter group for any value of the parameter c. In particular, we determine for which values of c this representation is finite dimensional. This generalizes a result of Varagnolo and Vasserot, arXiv:0705.2691, who classified finite dimensional spherical representations in the case of Weyl groups and equal parameters (i.e., when c is a constant function). As an application, we compute the zero set of the kernel of the Macdonald pairing in the trigonometric case (for equal parameters). Our proof is based on the Macdonald-Mehta integral and the elementary theory of distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑