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arXiv 1802.00481math.GRmath.AGmath.GT
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Presqu'un immeuble pour le group des automorphismes modérés

Presqu'un immeuble pour le groupe des automorphismes modérés

Stéphane Lamy, Piotr Przytycki

摘要:

受SL $_n$($\mathbb Q_p$)的Bruhat-Tits构造的启发,我们构造了一个完全度量空间X,其作用是仿射空间Tame($K^n$)的驯服自同构群. X中的点是某些单项赋值,并且X具有n-1维欧氏CW-复形的自然结构。当n = 3时,对特征为零的K,我们证明了X具有非正曲率且是单连通的,因而是CAT(0)空间.作为应用,我们得到了Tame($K^3$)中有限子群的可线性化性.

英文摘要:

Inspired by the Bruhat-Tits building of SL$_n$($\mathbb Q_p$), we construct a complete metric space X with an action of the tame automorphism group of the affine space Tame($K^n$). The points in X are certain monomial valuations, and X admits a natural structure of Euclidean CW-complex of dimension n-1. When n = 3, and for K of characteristic zero, we prove that X has non-positive curvature and is simply connected, hence is a CAT(0) space. As an application we obtain the linearizability of finite subgroups in Tame($K^3$).

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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