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arXiv 2404.16628math.GRmath.GT
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余弦交复形的准等距不变性

The quasi-isometry invariance of the Coset Intersection Complex

Brandeis University(布兰迪斯大学);Memorial University of Newfoundland(纽芬兰纪念大学)

Carolyn Abbott, Eduardo Martínez-Pedroza

AI总结:

本文研究了余弦交复形的准等距不变性,证明了其与群对的代数性质相关,并展示了其在特定群类中的几何特性。

摘要:

对于由一个群和有限个子群组成的群对(G,P),我们引入了一个simplicial G-复形K(G,P),称为余弦交复形。我们证明了K(G,P)的准等距类型和同伦类型是群对(G,P)的准等距不变量。经典性质P在G中的性质对应于K(G,P)的拓扑或几何性质,例如具有有限高度、具有有限宽度、近似Malnormal、具有Malnormal核心或具有厚度为一的性质。作为应用,我们得到一些代数性质P在G中的性质是群对(G,P)的准等距不变量。对于某一类右角Artin群及其最大极小子群,我们证明复形K(G,P)准等距到延伸图;特别是,它准等距到树。

英文摘要:

For a pair $(G,\mathcal{P})$ consisting of a group and finite collection of subgroups, we introduce a simplicial $G$-complex $\mathcal{K}(G,\mathcal{P})$ called the coset intersection complex. We prove that the quasi-isometry type and the homotopy type of $\mathcal{K}(G,\mathcal{P})$ are quasi-isometric invariants of the group pair $(G,\mathcal{P})$. Classical properties of $\mathcal{P}$ in $G$ correspond to topological or geometric properties of $\mathcal{K}(G,\mathcal{P})$, such as having finite height, having finite width, being almost malnormal, admiting a malnormal core, or having thickness of order one. As applications, we obtain that a number of algebraic properties of $\mathcal{P}$ in $G$ are quasi-isometry invariants of the pair $(G,\mathcal{P})$. For a certain class of right-angled Artin groups and their maximal parabolic subgroups, we show that the complex $\mathcal{K}(G,\mathcal{P})$ is quasi-isometric to the Extension graph; in particular, it is quasi-isometric to a tree.

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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