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arXiv 2108.03361math.GTmath.GR
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3-流形群的(QT)性质

Property (QT) for 3-manifold groups

Suzhen Han, Hoang Thanh Nguyen, Wenyuan Yang

AI总结:

本文证明了紧致可定向3-流形基本群具有(QT)性质的充要条件是其球-圆盘分解中无加项支撑Sol或Nil几何,并由此得到不可约3-流形群及Croke-Kleiner可容许群、相对双曲群的(QT)性质。

摘要:

根据Bestvina-Bromberg-Fujiwara的定义,一个有限生成群如果等距作用于有限个拟树的乘积,且轨道映射是拟等距嵌入,则称其具有(QT)性质。我们证明:一个紧致、连通、可定向3-流形M的基本群π₁(M)具有(QT)性质,当且仅当M的球-圆盘分解中没有任何加项支撑Sol或Nil几何。特别地,所有具有非平凡环面分解且不支撑Sol几何的紧致、可定向、不可约3-流形群都具有(QT)性质。在研究过程中,我们在自然假设下建立了Croke-Kleiner可容许群类和相对双曲群的(QT)性质。

英文摘要:

According to Bestvina-Bromberg-Fujiwara, a finitely generated group is said to have property (QT) if it acts isometrically on a finite product of quasi-trees so that orbital maps are quasi-isometric embeddings. We prove that the fundamental group $π_1(M)$ of a compact, connected, orientable 3-manifold $M$ has property (QT) if and only if no summand in the sphere-disc decomposition of $M$ supports either Sol or Nil geometry. In particular, all compact, orientable, irreducible 3-manifold groups with nontrivial torus decomposition and not supporting Sol geometry have property (QT). In the course of our study, we establish property (QT) for the class of Croke-Kleiner admissible groups and of relatively hyperbolic groups under natural assumptions has property (QT).

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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