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arXiv 0811.4382math.COmath.GR
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李型有限幺半群的$R$ -多项式

$R$-polynomials of finite monoids of Lie type

Kürşat Aker, Mahir Bilen Can, Müge Taşkín

摘要:

本文研究了Lie型有限幺半群$M$的Renner幺半群上的双边外尔群作用的轨道所对应的轨道Hecke代数的组合学.它表明Putcha在\cite{Putcha97}的Kazhdan-Lusztig对合(\cite{KL79})可以扩展到轨道Hecke代数,使一个定义的$R$ -多项式的间隔包含在一个给定的轨道。利用$R$ -多项式,我们计算了轨道上Bruhat-Chevalley序的默比乌斯函数.进一步,我们给出了一个包含在给定轨道中的区间同构于某个外尔群中的区间的必要条件。

英文摘要:

This paper concerns the combinatorics of the orbit Hecke algebra associated with the orbit of a two sided Weyl group action on the Renner monoid of a finite monoid of Lie type, $M$. It is shown by Putcha in \cite{Putcha97} that the Kazhdan-Lusztig involution (\cite{KL79}) can be extended to the orbit Hecke algebra which enables one to define the $R$-polynomials of the intervals contained in a given orbit. Using the $R$-polynomials, we calculate the Möbius function of the Bruhat-Chevalley ordering on the orbits. Furthermore, we provide a necessary condition for an interval contained in a given orbit to be isomorphic to an interval in some Weyl group.

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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