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We study equilibrium measures (K\"aenm\"aki measures) supported on self-affine sets generated by a finite collection of diagonal and anti-diagonal matrices acting on the plane and satisfying the strong separation property. Our main result…

动力系统 · 数学 2021-03-26 Jonathan Fraser , Thomas Jordan , Natalia Jurga

In this paper, we solve the long standing open problem on exact dimensionality of self-affine measures on the plane. We show that every self-affine measure on the plane is exact dimensional regardless of the choice of the defining iterated…

动力系统 · 数学 2017-08-22 Balázs Bárány , Antti Käenmäki

Ledrappier and Young introduced a relation between entropy, Lyapunov exponents and dimension for invariant measures of diffeomorphisms on compact manifolds. In this paper, we show that a self-affine measure on the plane satisfies the…

动力系统 · 数学 2015-11-20 Balázs Bárány

Let $X=\bigcup\varphi_{i}X$ be a strongly separated self-affine set in $\mathbb{R}^2$ (or one satisfying the strong open set condition). Under mild non-compactness and irreducibility assumptions on the matrix parts of the $\varphi_{i}$, we…

度量几何 · 数学 2017-12-21 Balázs Bárány , Michael Hochman , Ariel Rapaport

An affine iterated function system is a finite collection of affine invertible contractions and the invariant set associated to the mappings is called self-affine. In 1988, Falconer proved that, for given matrices, the Hausdorff dimension…

动力系统 · 数学 2018-05-02 Balazs Barany , Antti Kaenmaki , Henna Koivusalo

Under mild conditions we show that the affinity dimension of a planar self-affine set is equal to the supremum of the Lyapunov dimensions of self-affine measures supported on self-affine proper subsets of the original set. These self-affine…

动力系统 · 数学 2019-03-18 Ian D. Morris , Pablo Shmerkin

Assuming strong irreducibility and proximality, we prove that the Furstenberg measure, corresponding to a finitely supported measure on the general linear group of a finite dimensional real vector space, is exact dimensional. We also…

动力系统 · 数学 2020-07-14 Ariel Rapaport

We establish a generic formula for the generalised q-dimensions of measures supported by almost self-affine sets, for all q>1. These q-dimensions may exhibit phase transitions as q varies. We first consider general measures and then…

度量几何 · 数学 2015-05-14 K. J. Falconer

We prove that if $\mu$ is a self-affine measure in the plane whose defining IFS acts totally irreducibly on $\mathbb{RP}^1$ and satisfies an exponential separation condition, then its dimension is equal to its Lyapunov dimension. We also…

动力系统 · 数学 2019-05-06 Michael Hochman , Ariel Rapaport

In this paper, we investigate the Hausdorff measure of planar dominated self-affine sets at their affinity dimension. We show that the Hausdorff measure being positive and finite is equivalent to the K\"aenm\"aki measure being a mass…

动力系统 · 数学 2026-02-26 Balázs Bárány

We calculate the Assouad dimension of a planar self-affine set $X$ satisfying the strong separation condition and the projection condition and show that $X$ is minimal for the conformal Assouad dimension. Furthermore, we see that such a…

动力系统 · 数学 2020-06-23 Balázs Bárány , Antti Käenmäki , Eino Rossi

For planar self-affine sets satisfying the strong separation condition, recent work of B\'ar\'any, Hochman, and Rapaport gives mild assumptions under which the Hausdorff dimension equals the affinity dimension. In this paper, we study…

动力系统 · 数学 2026-03-05 Balázs Bárány , Antti Käenmäki , Han Yu

We study the pointwise dimension for a new class of projection measures on arbitrary fractal limit sets without separation conditions. We prove that the pointwise dimension exists a.e. for this class of measures associated to equilibrium…

动力系统 · 数学 2019-08-28 Eugen Mihailescu

We study the dimension theory of a class of planar self-affine multifractal measures. These measures are the Bernoulli measures supported on box-like self-affine sets, introduced by the author, which are the attractors of iterated function…

动力系统 · 数学 2016-06-07 Jonathan M. Fraser

We study the multifractal analysis of self-similar measures arising from random homogeneous iterated function systems. Under the assumption of the uniform strong separation condition, we see that this analysis parallels that of the…

动力系统 · 数学 2019-12-23 Kathryn E. Hare , Kevin G. Hare , Sascha Troscheit

We study the Assouad and quasi-Assoaud dimensions of dominated rectangular self-affine sets in the plane. In contrast to previous work on the dimension theory of self-affine sets, we assume that the sets satisfy certain separation…

动力系统 · 数学 2024-01-23 Jonathan M. Fraser , Alex Rutar

In this note we investigate some properties of equilibrium states of affine iterated function systems, sometimes known as K\"aenm\"aki measures. We give a simple sufficient condition for K\"aenm\"aki measures to have a gap between certain…

动力系统 · 数学 2017-10-23 Ian D. Morris

We show that the conditions imposed on a second order linear differential equation with rational coefficients on the complex line by requiring it to have regular singularities with fixed exponents at the points of a finite set $P$ and…

代数几何 · 数学 2016-08-09 Szilard Szabo

We compare the dimension of a non-invertible self-affine set to the dimension of the respective invertible self-affine set. In particular, for generic planar self-affine sets, we show that the dimensions coincide when they are large and…

动力系统 · 数学 2024-11-27 Antti Käenmäki , Petteri Nissinen

The local dimension spectrum provides a framework for quantifying the fractal properties of a measure, and it is well understood for non-overlapping self-similar measures. In this article, we study the local dimension spectrum for dominated…

动力系统 · 数学 2026-01-21 Alex Batsis , Antti Käenmäki , Tom Kempton
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