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We investigate criteria ensuring that a one-relator group $G$ contains a right-angled Artin subgroup $A(\Gamma)$, corresponding to a finite graph $\Gamma$. In particular, we prove that if $\Gamma$ is a forest with at least one edge and the…

Group Theory · Mathematics 2025-08-01 Ashot Minasyan , Motiejus Valiunas

We study subgroups and quotients of outer automorphism groups of right-angled Artin groups (RAAGs). We prove that for all RAAGS, the outer automorphism group is residually finite and, for a large class of RAAGs, it satisfies the Tits…

Group Theory · Mathematics 2010-03-24 Ruth Charney , Karen Vogtmann

There is a procedure, due to Dani and Levcovitz, for taking a finite simplicial graph (\Gamma) and a subgraph (\Lambda) of its complement, checking some conditions, and, if satisfied, producing a graph (\Delta) such that the right-angled…

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

We present a generalization of the Dehornoy-Brin braided Thompson group $BV_2$ that uses recursive braids. Our new groups are denoted by $BV_{n,r}(H)$, for all $n\geq 2,r\geq 1$ and $H \leq \mathcal{B}_n$, where $\mathcal{B}_n$ is the braid…

Group Theory · Mathematics 2020-07-31 Julio Aroca , María Cumplido

We give criteria for a graph of groups to have finite stature with respect to its collection of vertex groups, in the sense of Huang-Wise. We apply it to the triangle Artin groups that were previously shown to split as a graph of groups.…

Group Theory · Mathematics 2026-02-04 Kasia Jankiewicz

We show that non-abelian two-generator subgroups of right-angled Artin groups are quasi-isometrically embedded free groups. This provides an alternate proof of a theorem of A. Baudisch: that all two-generator subgroups are free or free…

Group Theory · Mathematics 2015-10-14 Mike Carr

Charney and Morris-Wright showed acylindrical hyperbolicity of Artin groups of infinite type associated with graphs that are not joins, by studying clique-cube complexes and the actions on them. The authors developed their study and…

Group Theory · Mathematics 2025-06-26 Motoko Kato , Shin-ichi Oguni

We prove that finitely generated purely loxodromic subgroups of a right-angled Artin group $A(\Gamma)$ fulfill equivalent conditions that parallel characterizations of convex cocompactness in mapping class groups $\text{Mod}(S)$. In…

Group Theory · Mathematics 2016-03-10 Thomas Koberda , Johanna Mangahas , Samuel J. Taylor

General arguments of Baumslag and Bieri guarantee that any metabelian group of finite Pr\"ufer rank can be embedded in a metabelian constructible group. Here, we consider the metric behavior of a rich class of examples and analyze the…

Group Theory · Mathematics 2018-03-28 Sean Cleary , Conchita Martínez-Pérez

We give sufficient conditions for left- and bi-orderability of fundamental groups of Ore categories in terms of indirect factors, including Thompson groups and many of their generalizations. Besides recovering known results, we prove that…

Group Theory · Mathematics 2025-03-17 Davide Perego , Matteo Tarocchi

In this paper, a connection between rewriting systems and embedding of monoids in groups is found. We show that if a group with a positive presentation has a complete rewriting system $\Re$ that satisfies the condition that each rule in…

Group Theory · Mathematics 2011-02-01 Fabienne Chouraqui

A new class of groups $\mathcal{C}$, containing all coherent RAAGs and all toral relatively hyperbolic groups, is defined. It is shown that, for a group $G$ in the class $\mathcal{C}$, the $\mathbb{Z}[t]$-exponential group…

Group Theory · Mathematics 2022-01-26 Montserrat Casals-Ruiz , Andrew Duncan , Ilya Kazachkov

We characterize twisted right-angled Artin groups (T-RAAGs) that are subgroup separable using only their defining mixed graphs: such a group is subgroup separable if and only if the underlying simplicial graph contains neither induced paths…

Group Theory · Mathematics 2025-04-29 Islam Foniqi

We study some aspects of the geometric representation theory of the Thompson and Neretin groups, suggested by their analogies with the diffeomorphism groups of the circle. We prove that the Burau representation of the Artin braid groups…

Geometric Topology · Mathematics 2007-05-23 C. Kapoudjian , V. Sergiescu

This paper is devoted to the proof of a structural theorem, concerning certain homomorphic images of Artin braid group on $n$ strands in finite symmetric groups. It is shown that any one of these permutation groups is an extension of the…

Group Theory · Mathematics 2009-12-08 Valentin Vankov Iliev

A result by Bridson, Howie, Miller, and Short states that if $S$ is a finitely presented subgroup of the direct product of free groups, then $S$ is virtually a nilpotent extension of a direct product of free groups. Moreover, if $S$ is a…

Group Theory · Mathematics 2023-10-10 Montserrat Casals-Ruiz , Jone Lopez de Gamiz Zearra

We characterize when (and how) a Right-Angled Artin group splits nontrivially over an abelian subgroup.

Group Theory · Mathematics 2015-02-03 Daniel Groves , Michael Hull

By introducing branching conditions on the defining graph, we prove a range of rigidity results for quasiisometric embeddings between right-angled Artin groups. The starting point for these is that, under mild conditions on the codomain,…

Group Theory · Mathematics 2026-05-13 Shaked Bader , Oussama Bensaid , Harry Petyt

In this paper we consider several classical and novel algorithmic problems for right-angled Artin groups, some of which are closely related to graph theoretic problems, and study their computational complexity. We study these problems with…

Group Theory · Mathematics 2018-11-01 Ramón Flores , Delaram Kahrobaei , Thomas Koberda

For every orientable surface of finite negative Euler characteristic, we find a right-angled Artin group of cohomological dimension two which does not embed into the associated mapping class group. For a right-angled Artin group on a graph…

Geometric Topology · Mathematics 2012-10-10 Sang-hyun Kim , Thomas Koberda