Property (QT) for 3-manifold groups

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 $\pi_1(M)$ 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).

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Publication Details

Journal
Algebraic & Geometric Topology
Published
2025-03-05
DOI
https://doi.org/10.2140/agt.2025.25.107
Citations
2
Primary Topic
Geometric and Algebraic Topology
Type
article
Field-Weighted Citation Impact
8.18

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article

Property (QT) for 3-manifold groups

Suzhen Han, Hoang Thanh Nguyen, Wenyuan Yang
2 citations
Algebraic & Geometric Topology
Geometric and Algebraic Topology
8.18
article

Property (QT) for 3-manifold groups

Suzhen Han, Hoang Thanh Nguyen, Wenyuan Yang
article en
2 citations

Abstract

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 $\pi_1(M)$ 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).

Algebraic & Geometric TopologyVol. 25(1)
FPT University (VN), Hunan University (CN), Peking University (CN), University of Science and Technology - The University of Da Nang (VN), Peking University International Hospital (CN)
National Natural Science Foundation of China
Openalex Percentile: Top 5%
Geometric and Algebraic Topology
8.18
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Property (QT) for 3-manifold groups — Suzhen Han, Hoang Thanh Nguyen, et al. · Algebraic & Geometric Topology (2025) | TGRS Research Map | TGRS