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We classify two-dimensional right-angled Coxeter groups that are quasiisometric to a right-angled Artin group defined by a tree, and show that when this is true the right-angled Coxeter group actually contains a visible finite index…

Group Theory · Mathematics 2025-11-12 Christopher H. Cashen

We show that the fundamental groups of any two closed irreducible non-geometric graph-manifolds are quasi-isometric. This answers a question of Kapovich and Leeb. We also classify the quasi-isometry types of fundamental groups of…

Geometric Topology · Mathematics 2010-04-13 Jason A. Behrstock , Walter D. Neumann

Let $G$ and $G'$ be two right-angled Artin groups (RAAG). We show they are quasi-isometric iff they are isomorphic, under the assumption that $Out(G)$ and $Out(G')$ are finite. If only $Out(G)$ is finite, then $G'$ is quasi-isometric $G$…

Group Theory · Mathematics 2018-03-16 Jingyin Huang

We are motivated by the question that for which class of right-angled Artin groups (RAAG's), the quasi-isometry classification coincides with commensurability classification. This is previously known for RAAG's with finite outer…

Geometric Topology · Mathematics 2024-12-03 Jingyin Huang

We define the intersection complex for the universal cover of a compact weakly special square complex and show that it is a quasi-isometry invariant. By using this quasi-isometry invariant, we study the quasi-isometric classification of…

Group Theory · Mathematics 2023-09-07 Sangrok Oh

We study atomic right-angled Artin groups -- those whose defining graph has no cycles of length less than five, and no separating vertices, separating edges, or separating vertex stars. We show that these groups are not quasi-isometrically…

Group Theory · Mathematics 2007-08-15 Mladen Bestvina , Bruce Kleiner , Michah Sageev

For a one-ended right-angled Artin group, we give an explicit description of its JSJ tree of cylinders over infinite cyclic subgroups in terms of its defining graph. This is then used to classify certain right-angled Artin groups up to…

Group Theory · Mathematics 2022-07-22 Alexander Margolis

We introduce the notion of quasi-roots and study their uniqueness in right-angled Artin groups.

Geometric Topology · Mathematics 2022-06-23 Eon-Kyung Lee , Sang-Jin Lee

We describe sufficient conditions which guarantee that a finite set of mapping classes generate a right-angled Artin group quasi-isometrically embedded in the mapping class group. Moreover, under these conditions, the orbit map to…

Geometric Topology · Mathematics 2010-07-26 Matt Clay , Christopher J. Leininger , Johanna Mangahas

Even Artin groups generalize right-angled Artin groups by allowing the labels in the defining graph to be even. In this paper a complete characterization of quasi-projective even Artin groups is given in terms of their defining graphs.…

Geometric Topology · Mathematics 2018-12-19 Ruben Blasco-Garcia , Jose I. Cogolludo-Agustin

In this paper we study the classification of right-angled Artin groups up to commensurability. We characterise the commensurability classes of RAAGs defined by trees of diameter 4. In particular, we prove a conjecture of Behrstock and…

Group Theory · Mathematics 2018-03-29 Montserrat Casals-Ruiz , Ilya Kazachkov , Alexander Zakharov

We describe the structure of quasiflats in two-dimensio\-nal Artin groups. We rely on the notion of metric systolicity developed in our previous work. Using this weak form of non-positive curvature and analyzing in details the combinatorics…

Group Theory · Mathematics 2020-03-23 Jingyin Huang , Damian Osajda

In \cite{Oh22}, the second author defined a complex of groups decomposition of the fundamental group of a finitely generated 2-dimensional special group, called an \emph{intersection complex}, which is a quasi-isometry invariant. In this…

Group Theory · Mathematics 2025-02-17 Byung Hee An , Sangrok Oh

The main goal of this note is to suggest an algebraic approach to the quasi-isometric classification of partially commutative groups (alias right-angled Artin groups). More precisely, we conjecture that if the partially commutative groups…

Group Theory · Mathematics 2018-03-02 Montserrat Casals-Ruiz

We characterize groups quasi-isometric to a right-angled Artin group $G$ with finite outer automorphism group. In particular all such groups admit a geometric action on a $CAT(0)$ cube complex that has an equivariant "fibering" over the…

Group Theory · Mathematics 2018-02-21 Jingyin Huang , Bruce Kleiner

Given a right-angled Artin group $G$ with finite outer automorphism group, we determine which right-angled Artin groups are measure equivalent (or orbit equivalent) to $G$.

Group Theory · Mathematics 2026-02-25 Camille Horbez , Jingyin Huang

We construct quasi-isometric embeddings from right-angled Artin groups into the outer automorphism group of a free group. These homomorphisms are in analogy with those constructed in \cite{CLM}, where the target group is the mapping class…

Geometric Topology · Mathematics 2013-03-28 Samuel J. Taylor

Recently, right-angled Artin groups have attracted much attention in geometric group theory. They have a rich structure of subgroups and nice algorithmic properties, and they give rise to cubical complexes with a variety of applications.…

Group Theory · Mathematics 2007-05-23 Ruth Charney

We prove that an arbitrary right-angled Artin group $G$ admits a quasi-isometric group embedding into a right-angled Artin group defined by the opposite graph of a tree. Consequently, $G$ admits quasi-isometric group embeddings into a pure…

Group Theory · Mathematics 2016-01-20 Sang-hyun Kim , Thomas Koberda

We prove that every right-angled Artin group occurs as a finite-index subgroup of the outer automorphism group of another right-angled Artin group. We furthermore show that the latter group can be chosen in such a way that the quotient is…

Group Theory · Mathematics 2024-03-14 Manuel Wiedmer
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