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arXiv 0910.0923math.COmath.GR
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型仿射$C$ Coxeter群中的不可消元

Non-cancellable elements in type affine $C$ Coxeter groups

Dana C. Ernst

摘要:

设$(W,S)$是一个Coxeter系统,并假设$w \in W$是完全可交换的(在Stembridge的意义上),并且有一个以$s \in S$开始(或结束)的简化表达式。如果存在$t\in S$使得$s$和$t$不对易,并且$tw$(分别为$wt$)不再是完全对易的,我们说$w$是关于$t$被$s$可约的左(分别为右)弱星。本文对$B$型和仿射$C$型Coxeter群中在弱星约化下不可约的全交换元进行了分类。在本文的续集中,弱星不可约元的Coxeter系统的仿射$C$类型的分类将提供基础的归纳参数用于证明的忠实性的广义Temperley-Lieb代数的仿射$C$类型的特定图代数。

英文摘要:

Let $(W,S)$ be a Coxeter system and suppose that $w \in W$ is fully commutative (in the sense of Stembridge) and has a reduced expression beginning (respectively, ending) with $s \in S$. If there exists $t\in S$ such that $s$ and $t$ do not commute and $tw$ (respectively, $wt$) is no longer fully commutative, we say that $w$ is left (respectively, right) weak star reducible by $s$ with respect to $t$. In this paper, we classify the fully commutative elements in Coxeter groups of types $B$ and affine $C$ that are irreducible under weak star reductions. In a sequel to this paper, the classification of the weak star irreducible elements in a Coxeter system of type affine $C$ will provide the groundwork for inductive arguments used to prove the faithfulness of a generalized Temperley--Lieb algebra of type affine $C$ by a particular diagram algebra.

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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