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We prove some results concerning the boundary of a convex set in $\H^n$. This includes the convergence of curvature measures under Hausdorff convergence of the sets, the study of normal points, and, for convex surfaces, a generalized Gauss…

Differential Geometry · Mathematics 2022-12-19 Giona Veronelli

In this paper, we give a new proof for the Hausdorff dimension of the non-dense orbit set for expanding maps. This proof is based on the sharp lower bound of the Hausdorff dimension of repellers given by Cao, Pesin and Zhao…

Dynamical Systems · Mathematics 2023-06-27 Congcong Qu

We construct functions $f \colon [0,1] \to [0,1]$ whose graph as a subset of $\mathbb{R}^2$ has Hausdorff dimension greater than any given value $\alpha \in (1,2)$ but conformal dimension $1$. These functions have the property that a…

Metric Geometry · Mathematics 2024-12-20 Matthew Romney

An approach is given for estimating the Hausdorff dimension of the univoque set of a self-similar set. This sometimes allows us to get the exact Hausdorff dimensions of the univoque sets.

Dynamical Systems · Mathematics 2017-08-21 Xiu Chen , Kan Jiang , Wenxia Li

For a C^{1+\alpha} diffeomorphism f preserving a hyperbolic ergodic SRB measure \mu, Katok's remarkable results assert that \mu can be approximated by a sequence of hyperbolic sets \{\Lambda_n\}_{n\geq1}. In this paper, we prove the…

Dynamical Systems · Mathematics 2022-02-24 Juan Wang , Congcong Qu , Yongluo Cao

We prove that if $J$ is the limit set of an irreducible conformal iterated function system (with either finite or countably infinite alphabet), then the badly approximable vectors form a set of full Hausdorff dimension in $J$. The same is…

Number Theory · Mathematics 2019-06-18 Tushar Das , Lior Fishman , David Simmons , Mariusz Urbański

Consider the problem of estimating the $\gamma$-level set $G^*_{\gamma}=\{x:f(x)\geq\gamma\}$ of an unknown $d$-dimensional density function $f$ based on $n$ independent observations $X_1,...,X_n$ from the density. This problem has been…

Statistics Theory · Mathematics 2009-08-26 Aarti Singh , Clayton Scott , Robert Nowak

We survey the definition of the radial Julia set of a meromorphic function (in fact, more generally, any "Ahlfors islands map"), and give a simple proof that the Hausdorff dimension of the reduced Julia set always coincides with the…

Dynamical Systems · Mathematics 2009-01-21 Lasse Rempe

We perform a multifractal analysis of homological growth rates of oriented geodesics on hyperbolic surfaces. Our main result provides a formula for the Hausdorff dimension of level sets of prescribed growth rates in terms of a generalized…

Dynamical Systems · Mathematics 2025-02-12 Johannes Jaerisch , Hiroki Takahasi

We provide a generalization of the McMullen's algorithm to approximate the Hausdorff dimension of the limit set for convex-cocompact subgroups of isometries of the Complex Hyperbolic Plane.

Dynamical Systems · Mathematics 2021-01-29 Alejandro Ucan-Puc , Sergio Romaña

This paper extends some results of [M5] and [M3], in particular, removing assumptions of positive lower density. We give conditions on a general family $P_{\lambda}:\mathbb{R}^{n}\to\mathbb{R}^{m}, \lambda \in \Lambda,$ of orthogonal…

Classical Analysis and ODEs · Mathematics 2023-10-12 Pertti Mattila

We investigate the continuity of Hausdorff dimension and box dimension (limit capacity) of non-hyperbolic repellers of diffeomorphisms derived from transitive Anosov diffeomophisms through a Hopf bifurcation studied by Horita and Viana (see…

Dynamical Systems · Mathematics 2026-05-28 Vanderlei Horita , Oyran Rayzzaro

We prove bounds for the almost sure value of the Hausdorff dimension of the limsup set of a sequence of balls in $\mathbf{R}^d$ whose centres are independent, identically distributed random variables. The formulas obtained involve the rate…

Classical Analysis and ODEs · Mathematics 2018-08-01 Fredrik Ekström , Tomas Persson

This paper presents a simple method of calculating the Hausdorff dimension for a class of non-conformal fractals.

Dynamical Systems · Mathematics 2015-05-18 Michal Rams

We prove that the boundary of a component $U$ of the basin of an attracting periodic cycle (of period greater than 1) for an exponential map on the complex plane has Hausdorff dimension greater than 1 and less than 2. Moreover, the set of…

Dynamical Systems · Mathematics 2011-05-26 Krzysztof Barański , Bogusława Karpińska , Anna Zdunik

For Borel subsets A and B of the Euclidean n-space the intersection of A with generic rotations and translations of B has often Hausdorff dimension at least dim A + dim B - n. Estimates for the exceptional set of rotations are derived.

Metric Geometry · Mathematics 2018-01-03 Pertti Mattila

We obtain new lower bounds on the Hausdorff dimension of distance sets and pinned distance sets of planar Borel sets of dimension slightly larger than $1$, improving recent estimates of Keleti and Shmerkin, and of Liu in this regime. In…

Classical Analysis and ODEs · Mathematics 2018-11-09 Pablo Shmerkin

In this article, we consider hyperbolic rational maps restricted on thier Julia sets and study about the recurrence rate of typical orbits in arbitrarily small neighbourhoods around them and their relationship to the Hausdorff dimension of…

Dynamical Systems · Mathematics 2013-10-18 Shrihari Sridharan

Polynomials and entire functions whose hyperbolic dimension is strictly smaller than the Hausdorff dimension of their Julia set are known to exist but in all these examples the latter dimension is maximal, i.e. equal to two. In this paper…

Dynamical Systems · Mathematics 2023-07-24 Volker Mayer , Mariusz Urbański

We consider digits-deleted sets or Cantor-type sets with $\beta$-expansions. We calculate the Hausdorff dimension $d$ of these sets and show that $d$ is continuous with respect to $\beta$. The $d$-dimentional Hausdorff measure of these sets…

Dynamical Systems · Mathematics 2007-07-02 Qinghe Yin