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We construct Ahlfors regular Cantor sets $K$ of small dimension in the plane, such that the Hausdorff measure on $K$ is equivalent to the harmonic measure associated to its complement. In particular the Green function in $R^2 \backslash K$…

Analysis of PDEs · Mathematics 2023-03-06 Guy David , Cole Jeznach , Antoine Julia

We define and study "hyperbolic forcing".

Differential Geometry · Mathematics 2016-09-21 Pedro Ontaneda

In this paper we provide a geometric condition satisfied by certain closed subsets of the Riemann sphere which implies that their hyperbolic convex hulls in $\mathbb{H}^3$ have infinite volume. As a corollary, we characterize continua in…

Geometric Topology · Mathematics 2026-05-07 Cameron MacMahon

We construct a geometrically self-similar Cantor set $X$ of genus $2$ in $\mathbb{R}^3$. This construction is the first for which the local genus is shown to be $2$ at every point of $X$. As an application, we construct, also for the first…

Geometric Topology · Mathematics 2023-03-22 Alastair N. Fletcher , Daniel Stoertz

We give three families of parabolic rational maps and show that every Cantor set of circles as the Julia set of a non-hyperbolic rational map must be quasisymmetrically equivalent to the Julia set of one map in these families for suitable…

Dynamical Systems · Mathematics 2015-10-13 Weiyuan Qiu , Fei Yang , Yongcheng Yin

Let $T : \Lambda \to \Lambda$ be an expanding map on a Cantor set. For each suitably normalized H\"older continuous potential, we construct a spectral triple from which one may recover the associated Gibbs measure as a noncommutative…

Dynamical Systems · Mathematics 2010-09-30 Richard Sharp

We will consider inclusion of metric balls defined by the quasihyperbolic, the $j$-metric and the chordal metric. The quasihyperbolic metric and the $j$-metric are considered in general subdomains of $\mathbb{R}^n$ and in some particular…

Metric Geometry · Mathematics 2013-01-14 Riku Klén , Matti Vuorinen

An {\em attractor} is a transitive set of a flow to which all positive orbit close to it converges. An attractor is {\em singular-hyperbolic} if it has singularities (all hyperbolic) and is partially hyperbolic with volume expanding central…

Dynamical Systems · Mathematics 2007-05-23 C. A. Morales

We construct simply connected, complete, non-$CMC$ biconservative surfaces in the $3$-dimensional hyperbolic space $\mathbb{H}^3$ in an intrinsic and extrinsic way. We obtain three families of such surfaces, and, for each surface, the set…

Differential Geometry · Mathematics 2019-09-30 Simona Nistor , Cezar Oniciuc

This paper completes a classification of the types of orientable and non-orientable cusps that can arise in the quotients of hyperbolic knot complements. In particular, $S^2(2,4,4)$ cannot be the cusp cross-section of any orbifold quotient…

Geometric Topology · Mathematics 2022-09-21 Neil R Hoffman

We study fractal properties of invariant graphs of hyperbolic and partially hyperbolic skew product diffeomorphisms in dimension three. We describe the critical (either Lipschitz or at all scales H\"older continuous) regularity of such…

Dynamical Systems · Mathematics 2017-02-22 Lorenzo J. Díaz , Katrin Gelfert , Maik Gröger , Tobias Jäger

For complex parameters a,c, we consider the Henon mapping H_{a,c}: C^2 -> C^2 given by (x,y) -> (x^2 +c -ay, x), and its Julia set, J. In this paper, we describe a rigorous computer program for attempting to construct a cone field in the…

Dynamical Systems · Mathematics 2009-02-12 Suzanne Lynch Hruska

A class of ultrametric Cantor sets $(C, d_{u})$ introduced recently in literature (Raut, S and Datta, D P (2009), Fractals, 17, 45-52) is shown to enjoy some novel properties. The ultrametric $d_{u}$ is defined using the concept of {\em…

Classical Analysis and ODEs · Mathematics 2011-03-31 D. P. Datta , S. Raut , A. Raychoudhuri

The aim of this paper is to provide some new tools to aid the study of decomposition complexity, a notion introduced by Guentner, Tessera and Yu. In this paper, three equivalent definitions for decomposition complexity are established. We…

Geometric Topology · Mathematics 2015-09-23 Andrew Nicas , David Rosenthal

It is known that any tame hyperbolic 3-manifold with infinite volume and a single end is the geometric limit of a sequence of finite volume hyperbolic knot complements. Purcell and Souto showed that if the original manifold embeds in the…

Geometric Topology · Mathematics 2023-06-22 Urs Fuchs , Jessica S. Purcell , John Stewart

This notes explores angle structures on ideally triangulated compact $3$-manifolds with high genus boundary. We show that the existence of angle structures implies the existence of a hyperbolic metric with totally geodesic boundary, and…

Geometric Topology · Mathematics 2014-05-13 Faze Zhang , Ruifeng Qiu , Tian Yang

We prove that every finite group is the orientation-preserving isometry group of the complement of a hyperbolic link in the 3-sphere.

Geometric Topology · Mathematics 2007-05-23 Luisa Paoluzzi , Joan Porti

We give a general procedure for constructing metric spaces from systems of partitions. This generalises and provides analogues of Sageev's construction of dual CAT(0) cube complexes for the settings of hyperbolic and injective metric…

Group Theory · Mathematics 2024-04-19 Harry Petyt , Abdul Zalloum , Davide Spriano

In this paper, we study the metric theory of dyadic approximation in the middle-third Cantor set. This theory complements earlier work of Levesley, Salp, and Velani (2007), who investigated the problem of approximation in the Cantor set by…

Number Theory · Mathematics 2020-05-20 Demi Allen , Sam Chow , Han Yu

We show that every isometric action on a Cantor set is conjugate to an inverse limit of actions on finite sets; and that every isometric action by a finitely generated amenable group is residually finite.

Dynamical Systems · Mathematics 2022-04-25 Samantha Pilgrim