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arXiv 1107.0537math.CO
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有限复反射群的余拟不变空间

Co-quasi-invariant spaces for finite complex reflection groups

Jean-Christophe Aval, François Bergeron

摘要:

本文研究了一般置换群W=G(r,n)的对角拟不变多项式生成的理想对l个n元集合的多项式环的商的全局一致性.我们证明了,对于每个这样的群W,存在一个显式的泛对称函数,它给出了这些空间的N^l-分次希尔伯特级数。这个函数是通用的,因为它对l的依赖性只涉及计算它的变量的数量。我们还讨论了所观察到的事实,它提供了一个扩展作为一个正系数多项式在完全齐次对称函数的组合的影响。

英文摘要:

We study, in a global uniform manner, the quotient of the ring of polynomials in l sets of n variables, by the ideal generated by diagonal quasi-invariant polynomials for general permutation groups W=G(r,n). We show that, for each such group W, there is an explicit universal symmetric function that gives the N^l-graded Hilbert series for these spaces. This function is universal in that its dependance on l only involves the number of variables it is calculated with. We also discuss the combinatorial implications of the observed fact that it affords an expansion as a positive coefficient polynomial in the complete homogeneous symmetric functions.

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。

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