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We introduce dynamic asymptotic dimension, a notion of dimension for actions of discrete groups on locally compact spaces, and more generally for locally compact \'etale groupoids. We study our notion for minimal actions of the integer…

Dynamical Systems · Mathematics 2015-10-28 Erik Guentner , Rufus Willett , Guoliang Yu

We introduce the group-compact coarse structure on a Hausdorff topological group in the context of coarse structures on an abstract group which are compatible with the group operations. We develop asymptotic dimension theory for the…

Geometric Topology · Mathematics 2012-01-24 Andrew Nicas , David Rosenthal

We show for a free action of a countable group $\Gamma$ on a finite-dimensional, compact metric space by homeomorphisms that the dynamic asymptotic dimension is either infinite or coincides with the asymptotic dimension of $\Gamma$.

Dynamical Systems · Mathematics 2025-01-07 Samantha Pilgrim

We investigate the dynamic asymptotic dimension for \'etale groupoids introduced by Guentner, Willett and Yu. In particular, we establish several permanence properties, including estimates for products and unions of groupoids. We also…

Dynamical Systems · Mathematics 2024-06-05 Christian Bönicke

We give a characterization for asymptotic dimension growth. We apply it to CAT(0) cube complexes of finite dimension, giving an alternative proof of N. Wright's result on their finite asymptotic dimension. We also apply our new…

Metric Geometry · Mathematics 2018-03-16 Goulnara Arzhantseva , Graham A. Niblo , Nick Wright , Jiawen Zhang

We prove the dynamic asymptotic dimension of a free isometric action on a space of finite doubling dimension is either infinite or equal to the asymptotic dimension of the acting group; and give a full description of the dynamic asymptotic…

Dynamical Systems · Mathematics 2023-01-31 SJ Pilgrim

We develop a method to bound the dynamic asymptotic dimension of isometric group actions $\Gamma\curvearrowright X$ in terms of the asymptotic dimension of a space of graphs similar to a box space of $\Gamma$ (which also determines…

Dynamical Systems · Mathematics 2021-08-03 Samantha Pilgrim

We show that the dynamic asymptotic dimension of a minimal free action of an infinite virtually cyclic group on a compact Hausdorff space is always one. This extends a well-known result of Guentner, Willett, and Yu for minimal free actions…

Dynamical Systems · Mathematics 2023-06-22 Massoud Amini , Kang Li , Damian Sawicki , Ali Shakibazadeh

In this article we study asymptotic properties of certain discrete groups $\Gamma$ acting by isometries on a product $\XX=\XX_1\times \XX_2$ of locally compact Hadamard spaces. The motivation comes from the fact that Kac-Moody groups over…

Metric Geometry · Mathematics 2014-11-11 Gabriele Link

We prove a Hurewicz-type theorem for the dynamic asymptotic dimension originally introduced by Guentner, Willett, and Yu. Calculations of (or simply upper bounds on) this dimension are known to have implications related to cohomology of…

Group Theory · Mathematics 2025-10-29 Samantha Pilgrim

We show that the asymptotic dimension of box spaces behaves (sub)additively with respect to extensions of groups. As a result, we obtain that for an elementary amenable group, the asymptotic dimension of any of its box spaces is bounded…

Metric Geometry · Mathematics 2015-08-21 Martin Finn-Sell , Jianchao Wu

We initiate a study of asymptotic dimension for locally compact groups. This notion extends the existing invariant for discrete groups and is shown to be finite for a large class of residually compact groups. Along the way, the notion of…

Dynamical Systems · Mathematics 2024-04-17 Massoud Amini

We obtain two in a sense dual to each other results: First, that the capacity dimension of every compact, locally self-similar metric space coincides with the topological dimension, and second, that the asymptotic dimension of a metric…

Geometric Topology · Mathematics 2009-06-04 Sergei Buyalo , Nina Lebedeva

It is relatively easy to construct a finitely generated group with infinite asymptotic dimension: the restricted wreath product of $\mathbb{Z}$ by $\mathbb{Z}$ provides an example. In light of this, it becomes interesting to consider the…

Group Theory · Mathematics 2007-05-23 Gregory C. Bell

Coxeter groups admit amenable actions on compact spaces. Moreover, they have finite asymptotic dimension.

Geometric Topology · Mathematics 2007-05-23 A. N. Dranishnikov , T. Januszkiewicz

We prove that for a coarse space $X$ the ideal $S(X)$ of small subsets of $X$ coincides with the ideal $D_<(X)$ of subsets $A\subset X$ of asymptotic dimension $asdim(A)<asdim(X)$ provided that $X$ is coarsely equivalent to an Euclidean…

Metric Geometry · Mathematics 2014-12-04 Taras Banakh , Ostap Chervak , Nadya Lyaskovska

We develop a geometric framework to address asymptoticity and nonexpansivity in topological dynamics. Our framework can be applied when the acting group is second countable and locally compact. As an application, we show extensions of…

Dynamical Systems · Mathematics 2023-01-27 Sebastián Donoso , Alejandro Maass , Samuel Petite

We prove a version of the countable union theorem for asymptotic dimension and we apply it to groups acting on asymptotically finite dimensional metric spaces. As a consequence we obtain the following finite dimensionality theorems. A) An…

Group Theory · Mathematics 2014-10-01 G. Bell , A. Dranishnikov

Let X be a Hadamard manifold and $\Gamma$ a discrete group of isometries of X which contains an axial isometry without invariant flat half plane. We study the behavior of conformal densities on the geometric limit set of $\Gamma$ in order…

Differential Geometry · Mathematics 2007-05-23 Gabriele Link

For discrete measured groupoids preserving a probability measure we introduce a notion of sofic dimension that measures the asymptotic growth of the number of sofic approximations on larger and larger finite sets. In the case of groups we…

Dynamical Systems · Mathematics 2012-11-13 Ken Dykema , David Kerr , Mikael Pichot
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