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In this paper we study topological invariants of a class of random groups. Namely, we study right angled Artin groups associated to random graphs and investigate their Betti numbers, cohomological dimension and topological complexity. The…

Algebraic Topology · Mathematics 2011-01-11 Armindo Costa , Michael Farber

We compute the $p$-central and exponent-$p$ series of all right angled Artin groups, and compute the dimensions of their subquotients. We also describe their associated Lie algebras, and relate them to the cohomology ring of the group as…

Group Theory · Mathematics 2020-05-14 Laurent Bartholdi , Henrika Härer , Thomas Schick

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 place conditions on the presentation graph of a right-angled Artin group that guarantee the standard CAT(0) cube complex on which the group acts geometrically has non-path-connected boundary.

Group Theory · Mathematics 2012-10-30 Wes Camp

We prove the $\Sigma^1$-conjecture for two families of Artin groups: Artin groups such that there exists a prime number $p$ dividing $\frac{l(e)}{2}$ for every edge $e$ with even label $>2$ and balanced Artin groups. The family of balanced…

Group Theory · Mathematics 2025-07-15 Marcos Escartín Ferrer

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

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 give a bound for the virtually cyclic dimension of groups with a normal subgroup of finite index which satisfies that every infinite virtually-cyclic subgroup is contained in a unique maximal such subgroup. As an application we provide a…

Algebraic Topology · Mathematics 2018-04-12 Alejandra Trujillo-Negrete

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 prove by explicit construction that graph braid groups and most surface groups can be embedded in a natural way in right-angled Artin groups, and we point out some consequences of these embedding results. We also show that every…

Group Theory · Mathematics 2014-10-01 John Crisp , Bert Wiest

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

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

For a finite simplicial graph $\Gamma$, let $A(\Gamma)$ denote the right-angled Artin group on $\Gamma$. Recently Kim and Koberda introduced the extension graph $\Gamma^e$ for $\Gamma$, and established the Extension Graph Theorem: for…

Geometric Topology · Mathematics 2018-07-03 Eon-Kyung Lee , Sang-Jin Lee

We explicitly construct an embedding of a right-angled Artin group into a classical pure braid group. Using this we obtain a number of corollaries describing embeddings of arbitrary Artin groups into right-angled Artin groups and linearly…

Group Theory · Mathematics 2013-12-02 Travis Scrimshaw

According to the Tits conjecture proved by Crisp and Paris, [CP], the subgroups of the braid group generated by proper powers of the Artin elements are presented by the commutators of generators which are powers of commuting elements. Hence…

Group Theory · Mathematics 2009-04-10 Michael Lönne

In this article, we prove that embeddings of right-angled Artin group $A_1$ on the complement of a linear forest into another right-angled Artin group $A_2$ can be reduced to full embeddings of the defining graph of $A_1$ into the extension…

Group Theory · Mathematics 2017-10-10 Takuya Katayama

In this paper, we define the notion of a virtually symmetric representation of representations of virtual braid groups and prove that many known representations are equivalent to virtually symmetric. Using one such representation, we define…

Geometric Topology · Mathematics 2021-12-13 Valeriy G. Bardakov , Mikhail V. Neshchadim , Manpreet Singh

We give a complete characterisation of when the right-angled Artin group on one cycle graph can be quasiisometrically embedded in the right-angled Artin group on another cycle graph. In particular, we find infinitely many instances of…

Group Theory · Mathematics 2026-05-14 Shaked Bader , Oussama Bensaid , Harry Petyt

Starting from the observation that the standard presentation of a virtual braid group mixes the standard presentation of the corresponding braid group with the standard presentation of the corresponding symmetric group and some mixed…

Group Theory · Mathematics 2021-10-28 Paolo Bellingeri , Luis Paris , Anne-Laure Thiel

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