arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1301.0873math.GRmath.COmath.GTmath.RT
收藏

Coxeter群的无穷约化字与Tits边界

Infinite reduced words and the Tits boundary of a Coxeter group

Thomas Lam, Anne Thomas

摘要:

设(W,S)是有限秩Coxeter系统,且W为无穷大.我们证明了W的无限约化字块上的极限弱序是由W的Davis复形X的Tits边界的拓扑编码的。我们考虑许多特殊情况,包括W字双曲,和X与孤立单位。证明了当W是双曲群时,极限弱阶是有限Coxeter群的弱阶的不交并。我们还建立了,对于每个边界点,一个自然序保持对应之间的无限减少的字“指向”,和元素的反射子群的W,固定。

英文摘要:

Let (W,S) be a finite rank Coxeter system with W infinite. We prove that the limit weak order on the blocks of infinite reduced words of W is encoded by the topology of the Tits boundary of the Davis complex X of W. We consider many special cases, including W word hyperbolic, and X with isolated flats. We establish that when W is word hyperbolic, the limit weak order is the disjoint union of weak orders of finite Coxeter groups. We also establish, for each boundary point ξ, a natural order-preserving correspondence between infinite reduced words which "point towards" ξ, and elements of the reflection subgroup of W which fixes ξ.

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。

↑