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A new family of groups, called trickle groups, is presented. These groups generalize right-angled Artin and Coxeter groups, as well as cactus groups. A trickle group is defined by a presentation with relations of the form $xy = zx$ and…

Group Theory · Mathematics 2024-12-09 Paolo Bellingeri , Eddy Godelle , Luis Paris

We prove that some classes of triangle-free Artin groups act properly on locally finite, finite-dimensional CAT(0) cube complexes. In particular, this provides the first examples of Artin groups that are properly cubulated but cannot be…

Geometric Topology · Mathematics 2020-10-06 Thomas Haettel

We observe that, for each positive integer n > 2, each of the Artin groups of finite type A_n, B_n=C_n, and affine type \tilde A_{n-1} and \tilde C_{n-1} is a central extension of a finite index subgroup of the mapping class group of the…

Group Theory · Mathematics 2007-05-23 Ruth Charney , John Crisp

We observe an inductive structure in a large class of Artin groups and exploit this information to deduce the Farrell-Jones isomorphism conjecture for several classes of Artin groups of finite real, complex and affine types.

Group Theory · Mathematics 2024-03-25 S. K. Roushon

Using graph of groups decompositions of finitely generated groups, we define Euler characteristic type invariants which are non-zero in many interesting classes of finitely presented, hyperbolic, limit and CSA groups, including elementarily…

Group Theory · Mathematics 2018-02-22 Mihalis Sykiotis

We show that every finitely generated Artin-Tits group admits a finite Garside family, by introducing the notion of a low element in a Coxeter group and proving that the family of all low elements in a Coxeter system (W, S) with S finite…

Group Theory · Mathematics 2014-12-01 Patrick Dehornoy , Matthew Dyer , Christophe Hohlweg

Let $G$ be a right-angled Artin group with $|\mathrm{Out}(G)|<+\infty$. We prove that if a countable group $H$ with bounded torsion is measure equivalent to $G$, with an $L^1$-integrable measure equivalence cocycle towards $G$, then $H$ is…

Group Theory · Mathematics 2025-10-09 Camille Horbez , Jingyin Huang

We prove that affine Coxeter groups, even hyperbolic Coxeter groups and one-ended hyperbolic Coxeter groups are homogeneous in the sense of model theory. More generally, we prove that many (Gromov) hyperbolic groups generated by torsion…

Group Theory · Mathematics 2026-01-21 Simon André , Gianluca Paolini

The orbifold braid groups of two dimensional orbifolds were defined in [1] (arXiv:math/9907194) to understand certain Artin groups as subgroups of some suitable orbifold braid groups. We studied orbifold braid groups in some more detail in…

Group Theory · Mathematics 2023-09-08 S. K. Roushon

We prove that finite index subgroups of right angled Artin groups are conjugacy separable. We then apply this result to establish various properties of other classes of groups. In particular, we show that any word hyperbolic Coxeter group…

Group Theory · Mathematics 2014-01-16 Ashot Minasyan

A Garside group is a group admitting a finite lattice generating set D. Using techniques developed by Bestvina for Artin groups of finite type, we construct K(\pi,1)s for Garside groups. This construction shows that the (co)homology of any…

Group Theory · Mathematics 2007-05-23 Ruth Charney , John Meier , Kim Whittlesey

For any right-angled Artin group, we show that its outer automorphism group contains either a finite-index nilpotent subgroup or a nonabelian free subgroup. This is a weak Tits alternative theorem. We find a criterion on the defining graph…

Group Theory · Mathematics 2009-10-27 Matthew B. Day

In this paper the author finds explicitly all finite-dimensional irreducible representations of a series of finite permutation groups that are homomorphic images of Artin braid group.

Representation Theory · Mathematics 2010-02-23 Valentin Vankov Iliev

In this paper we study (logical) types and isotypical equivalence of torsion free Abelian groups. We describe all possible types of elements and standard 2-tuples of elements in these groups and classify separable torsion free Abelian…

Group Theory · Mathematics 2024-09-13 Elena Bunina

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 finitely generated torsion-free solvable groups $G$ that have infinite rank, but such that all finitely generated torsion-free metabelian subquotients of $G$ are virtually abelian. In particular all finitely generated…

Group Theory · Mathematics 2023-08-30 Adrien Le Boudec , Nicolás Matte Bon

We prove that the rank problem is decidable in the class of torsion-free word-hyperbolic Kleinian groups. We also show that every group in this class has only finitely many Nielsen equivalence classes of generating sets of a given…

Geometric Topology · Mathematics 2014-11-11 Ilya Kapovich , Richard Weidmann

Clean markings on surfaces were a key component in Masur and Minsky's hierarchy machinery, which proved to be a powerful tool in the study of mapping class groups. We construct a marking graph for irreducible finite-type Artin groups which…

Group Theory · Mathematics 2025-08-15 Kaitlin Ragosta

We prove that acylindrically hyperbolic groups are monotileable. That is, every finite subset of the group is contained in a finite tile. This provides many new examples of monotileable groups, and progress on the question of whether every…

Group Theory · Mathematics 2026-05-14 Joseph MacManus , Lawk Mineh

In this note we prove that the affine Artin group of type $\widetilde B_n$ is virtually poly-free. The proof also gives another solution of the $K(\pi, 1)$ problem for $\widetilde B_n$.

Group Theory · Mathematics 2025-10-31 Li Li , S. K. Roushon
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