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arXiv 2303.09504math.GRmath.GT
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Artin幺半群Cayley图

The Artin monoid Cayley graph

Rachael Boyd, Ruth Charney, Rose Morris-Wright, Sarah Rees

AI总结:

本文研究Artin幺半群Cayley图的性质,证明其与锥化修正后的Deligne复形拟等距,给出该图无限直径的判据,并验证含特定3生成子群的Artin群满足无限直径猜想。

摘要:

本文研究Artin幺半群Cayley图的性质,该图是Artin群$A_Γ$关于其相伴Artin幺半群$A^+_Γ$所给出的(无限)生成集对应的Cayley图。在前期论文中,前三位作者引入了幺半群Deligne复形,并证明该复形对所有Artin群都是可缩的。本文中,我们证明Artin幺半群Cayley图与$A_Γ$的Deligne复形的一种修正版拟等距,该修正版通过将幺半群Deligne复形的各平移副本做锥化处理得到。随后我们探讨幺半群Cayley图何时具有无限直径的问题,我们猜想该结论对所有无限型Artin群都成立。我们给出了一组蕴含无限直径的判据,并利用大型Artin群和3-自由Artin群字问题的已有解法,证明该猜想对任何包含一个上述两类中任意一类的3生成子群的Artin群都成立。

英文摘要:

In this paper we investigate properties of the Artin monoid Cayley graph. This is the Cayley graph of an Artin group $A_Γ$ with respect to the (infinite) generating set given by the associated Artin monoid $A^+_Γ$. In a previous paper, the first three authors introduced a monoid Deligne complex and showed that this complex is contractible for all Artin groups. In this paper, we show that the Artin monoid Cayley graph is quasi-isometric to a modification of the Deligne complex for $A_Γ$ obtained by coning off translates of the monoid Deligne complex. We then address the question of when the monoid Cayley graph has infinite diameter. We conjecture that this holds for all Artin groups of infinite type. We give a set of criteria that imply infinite diameter, and using existing solutions to the word problem for large-type Artin groups and 3-free Artin groups, we prove that the conjecture holds for any Artin group containing a 3-generator subgroup of one of these two types.

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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