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In this note, we prove that the $K(\pi,1)$-conjecture for Artin groups implies the center conjecture for Artin groups. Specifically, every Artin group without a spherical factor that satisfies the $K(\pi,1)$-conjecture has a trivial center.

Group Theory · Mathematics 2022-01-19 Kasia Jankiewicz , Kevin Schreve

We reduce a strong version of the twist conjecture for Artin groups to Artin groups whose defining graphs have no separating vertices. This produces new examples of Artin groups satisfying the conjecture, and sheds more light on the…

Group Theory · Mathematics 2026-05-13 Oli Jones , Giorgio Mangioni , Giovanni Sartori

We prove the strong Atiyah conjecture for right-angled Artin groups and right-angled Coxeter groups. More generally, we prove it for groups which are certain finite extensions or elementary amenable extensions of such groups.

Geometric Topology · Mathematics 2012-10-12 Peter Linnell , Boris Okun , Thomas Schick

We show that for a large class of Artin groups with Dynkin diagrams being a tree, the $K(\pi,1)$-conjecture holds. We also establish the $K(\pi,1)$-conjecture for another class of Artin groups whose Dynkin diagrams contain a cycle, which…

Group Theory · Mathematics 2024-10-31 Jingyin Huang

We prove that any standard parabolic subgroup of any Artin group is convex with respect to the standard generating set.

Group Theory · Mathematics 2017-05-04 Ruth Charney , Luis Paris

We prove that two Artin groups of spherical type are isomorphic if and only if their defining Coxeter graphs are the same.

Group Theory · Mathematics 2007-05-23 Luis Paris

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

Given a finite graph G there is a corresponding group given by the presentation with generators the vertices of G and a relation [x,y]=1 for generators x and y precisely when (x,y) is an edge of G. Such groups are known as partially…

Group Theory · Mathematics 2007-07-03 Andrew J Duncan , Ilya V Kazachkov , Vladimir N Remeslennikov

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

The Tits Conjecture, proved by Crisp and Paris, states that squares of the standard generators of any Artin group generate an obvious right-angled Artin subgroup. We consider a larger set of elements consisting of all the centers of the…

Group Theory · Mathematics 2022-01-19 Kasia Jankiewicz , Kevin Schreve

While finite type Artin groups and right-angled Artin groups are well-understood, little is known about more general Artin groups. In this paper we use the action of an infinite type Artin group $A_\Gamma$ on a CAT(0) cube complex to prove…

Group Theory · Mathematics 2018-06-04 Ruth Charney , Rose Morris-Wright

We characterize twisted right-angled Artin groups whose finitely generated subgroups are also twisted right-angled Artin groups. Additionally, we give a classification of coherence within this class of groups in terms of the defining graph.…

Group Theory · Mathematics 2025-05-01 Simone Blumer , Islam Foniqi , Claudio Quadrelli

We classify the Artin groups that admit retractions onto all of their parabolic subgroups. Our approach relies on a detailed analysis of triangular subgroups, with a key ingredient being the classification of homomorphisms between dihedral…

Group Theory · Mathematics 2026-03-17 Bruno Aarón Cisneros de la Cruz , María Cumplido , Islam Foniqi , Luis Paris

It was conjectured by Tits that the only relations amongst the squares of the standard generators of an Artin group are the obvious ones, namely that a^2 and b^2 commute if ab=ba appears as one of the Artin relations. In this paper we prove…

Group Theory · Mathematics 2009-10-31 John Crisp , Luis Paris

Artin's conjecture is established for all forms that can be realised as a diagonal form on an hyperplane.

Number Theory · Mathematics 2018-06-14 Jörg Brüdern , Olivier Robert

The purpose of this paper is to put together a large amount of results on the $K(\pi,1)$ conjecture for Artin groups, and to make them accessible to non-experts. Firstly, this is a survey, containing basic definitions, the main results,…

Group Theory · Mathematics 2012-12-03 Luis Paris

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

We prove that an Artin-Tits group of type $\tilde C$ is the group of fractions of a Garside monoid, analogous to the known dual monoids associated with Artin-Tits groups of spherical type and obtained by the "generated group" method. This…

Group Theory · Mathematics 2011-07-27 François Digne

We prove that Artin groups from a class containing all large-type Artin groups are systolic. This provides a concise yet precise description of their geometry. Immediate consequences are new results concerning large-type Artin groups:…

Group Theory · Mathematics 2019-08-14 Jingyin Huang , Damian Osajda

For $n\in \mathbb{N}$, a group is called $n$-coherent if every subgroup of type $\mathsf{F}_n$ is of type $\mathsf{F}_{n+1}$. For $n\ge 1$, we observe that graphs of groups with $n$-coherent vertex groups and virtually poly-cyclic edge…

Group Theory · Mathematics 2025-11-26 Kevin Li , Luis Jorge Sánchez Saldaña
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