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Extended admissible groups belong to a particular class of graphs of groups that admit a decomposition generalizing those of non-geometric 3-manifold groups and Croke-Kleiner admissible groups. In this paper, we study several…

Group Theory · Mathematics 2026-01-01 Toan Trong Dao , Hoang Thanh Nguyen

For arbitrary integer n, we describe a large class of right-angled Coxeter systems for which the visual baundary (of the corresponding Coxeter-Davis complex) is homeomorphic to the n-dimensional Sierpi\'nski compactum. We also provide a…

Geometric Topology · Mathematics 2017-09-27 Jacek Świątkowski

This paper introduces a new class of right-angled Coxeter groups with totally disconnected Morse boundaries. We construct this class recursively by examining how the Morse boundary of a right-angled Coxeter group changes if we glue a graph…

Geometric Topology · Mathematics 2021-07-16 Annette Karrer

We study and classify a class of representations (called generalized geometric representations) of a Coxeter group of finite rank. These representations can be viewed as a natural generalization of the geometric representation. The…

Representation Theory · Mathematics 2023-12-11 Hongsheng Hu

The rich theory of Coxeter groups is used to provide an algebraic construction of finite volume hyperbolic n-manifolds. Combinatorial properties of finite images of these groups can be used to compute the volumes of the resulting manifolds.…

Geometric Topology · Mathematics 2007-06-13 Brent Everitt

We study coherence of graph products and Coxeter groups and obtain many results in this direction.

Group Theory · Mathematics 2018-07-23 Olga Varghese

We consider the class of those Coxeter groups for which removing from the Cayley graph any tubular neighbourhood of any wall leaves exactly two connected components. We call these Coxeter groups bipolar. They include both the virtually…

Group Theory · Mathematics 2012-03-07 Pierre-Emmanuel Caprace , Piotr Przytycki

The geometries of spaces having as groups the real orthogonal groups and some of their contractions are described from a common point of view. Their central extensions and Casimirs are explicitly given. An approach to the trigonometry of…

High Energy Physics - Theory · Physics 2011-04-15 Mariano Santander , Francisco J. Herranz

We give an up-to-date overview of geometric and topological properties of cosymplectic and coKaehler manifolds. We also mention some of their applications to time-dependent mechanics.

Differential Geometry · Mathematics 2013-11-22 Beniamino Cappelletti-Montano , Antonio De Nicola , Ivan Yudin

For right-angled Coxeter groups $W_{\Gamma}$, we obtain a condition on $\Gamma$ that is necessary and sufficient to ensure that $W_{\Gamma}$ is thick and thus not relatively hyperbolic. We show that Coxeter groups which are not thick all…

Group Theory · Mathematics 2017-03-22 Jason Behrstock , Mark F. Hagen , Alessandro Sisto , Pierre-Emmanuel Caprace

The main theorem of this paper classifies the quasi-geodesics in a Coxeter group that are tracked by geodesics. As corollaries, we show that if a Coxeter group acts geometrically on a CAT(0) space X then CAT(0) rays (and lines) are tracked…

Group Theory · Mathematics 2014-02-26 Michael L. Mihalik , Steven Tschantz

Geodesics and curvature of semidirect product groups with right invariant metrics are determined. In the special case of an isometric semidirect product, the curvature is shown to be the sum of the curvature of the two groups. A series of…

Differential Geometry · Mathematics 2007-05-23 Cornelia Vizman

In this paper, some generalized metric properties in strongly topological gyrogroups are studied.

General Topology · Mathematics 2021-02-16 Meng Bao , Xuewei Ling , Xiaoquan Xu

We consider asymptotic dimension of coarse spaces. We analyse coarse structures induced by metrisable compactifications. We calculate asymptotic dimension of coarse cell complexes. We calculate the asymptotic dimension of certain negatively…

Metric Geometry · Mathematics 2007-05-23 Bernd Grave

We give a simple construction of Gromov hyperbolic Coxeter groups of arbitrarily large virtual cohomological dimension. Our construction provides new examples of such groups. Using this one can construct e.g. new groups having some…

Group Theory · Mathematics 2010-03-04 Damian Osajda

This paper overviews recent developments in the classification up to quasi-isometry of finitely generated groups, and more specifically of relatively hyperbolic groups.

Geometric Topology · Mathematics 2007-05-23 Cornelia Drutu

In this short note we discuss the interplay between finite Coxeter groups and construction of wavelet sets, generalized multiresolution analysis and sampling.

Functional Analysis · Mathematics 2007-10-19 M. Dobrescu , G. Olafsson

The lower central series of the rgiht-angled Coxeter group $RC_\mathcal K$ and the corresponding graded Lie algebra $L(RC_\mathcal K)$ associated with the lower central series of a right-angled Coxeter group are studied. Relations are…

Group Theory · Mathematics 2022-08-17 Yakov Veryovkin

Hierarchically hyperbolic spaces (HHSs) are a large class of spaces that provide a unified framework for studying the mapping class group, right-angled Artin and Coxeter groups, and many 3--manifold groups. We investigate strongly…

Group Theory · Mathematics 2021-06-18 Jacob Russell , Davide Spriano , Hung Cong Tran

This is a survey on cohomogeneity one manifolds with positive curvature. We discuss the known examples of this type and their geometry and the functions that describe the metric. We also describe the classification of cohomogeneity one…

Differential Geometry · Mathematics 2007-07-24 Wolfgang Ziller