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An inhomogeneous fractal set is one which exhibits different scaling behaviour at different points. The Assouad dimension of a set is a quantity which finds the `most difficult location and scale' at which to cover the set and its…

动力系统 · 数学 2018-05-02 Jonathan M. Fraser , Mike Todd

In this paper we propose a new model of random graph directed fractals that extends the current well-known model of random graph directed iterated function systems, $V$-variable attractors, and fractal and Mandelbrot percolation. We study…

度量几何 · 数学 2019-12-23 Sascha Troscheit

A well-known theorem of J.E. Hutchinson states that if an iterated function system consists of similarity transformations and satisfies the open set condition then its attractor supports a self-similar measure with Hausdorff dimension equal…

动力系统 · 数学 2021-06-22 Ian D. Morris , Cagri Sert

We study non-autonomous conformal iterated function systems, with finite or countably infinite alphabet alike. These differ from the usual (autonomous) iterated function systems in that the contractions applied at each step in time are…

动力系统 · 数学 2020-08-26 Lasse Rempe-Gillen , Mariusz Urbański

This paper considers self-conformal iterated function systems (IFSs) on the real line whose first level cylinders overlap. In the space of self-conformal IFSs, we show that generically (in topological sense) if the attractor of such a…

经典分析与常微分方程 · 数学 2020-12-16 Balázs Bárány , István Kolossváry , Michał Rams , Károly Simon

Moran sets are a non-autonomous generalization of self-similar sets. In this paper, we study the quasi-Assouad and Assouad dimensions of Moran sets in $\mathbb{R}^{d}$. First we provide quasi-Assouad dimension formulae for Moran sets…

动力系统 · 数学 2025-11-13 Junjie Miao , Minghui Xu

We compute the Hausdorff, upper box and packing dimensions for certain inhomogeneous Moran set constructions. These constructions are beyond the classical theory of iterated function systems, as different nonlinear contraction…

动力系统 · 数学 2012-11-14 Mark Holland , Yiwei Zhang

We quantify the pointwise doubling properties of self-similar measures using the notion of pointwise Assouad dimension. We show that all self-similar measures satisfying the open set condition are pointwise doubling in a set of full…

动力系统 · 数学 2024-01-09 Roope Anttila , Ville Suomala

It is known that if the underlying iterated function system satisfies the open set condition, then the upper box dimension of an inhomogeneous self-similar set is the maximum of the upper box dimensions of the homogeneous counterpart and…

经典分析与常微分方程 · 数学 2019-09-20 Simon Baker , Jonathan M. Fraser , András Máthé

We show that self-conformal subsets of $\mathbb{R}$ that do not satisfy the weak separation condition have full Assouad dimension. Combining this with a recent results by K\"aenm\"aki and Rossi we conclude that an interesting dichotomy…

动力系统 · 数学 2019-05-02 Jasmina Angelevska , 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

Hausdorff and box dimension are two familiar notions of fractal dimension. Box dimension can be larger than Hausdorff dimension, because in the definition of box dimension, all sets in the cover have the same diameter, but for Hausdorff…

度量几何 · 数学 2024-06-12 Amlan Banaji

In this paper, we study the Hausdorff dimension of self-similar measures and sets on the real line, where the generating iterated function system consists of some maps that share the same fixed point. In particular, we will show that out of…

动力系统 · 数学 2025-07-09 Balázs Bárány , Manuj Verma

We consider the Assouad dimensions of orthogonal projections of planar sets onto lines. Our investigation covers both general and self-similar sets. For general sets, the main result is the following: if a set in the plane has Assouad…

经典分析与常微分方程 · 数学 2017-05-04 Jonathan M. Fraser , Tuomas Orponen

We study dimensions of sumsets and iterated sumsets and provide natural conditions which guarantee that a set $F \subseteq \mathbb{R}$ satisfies $\overline{\dim}_\text{B} F+F > \overline{\dim}_\text{B} F$ or even $\dim_\text{H} n F \to 1$.…

度量几何 · 数学 2021-03-26 Jonathan M. Fraser , Douglas C. Howroyd , Han Yu

We study the collection of microsets of randomly constructed fractals, which in this paper, are referred to as Galton-Watson fractals. This is a model that generalizes Mandelbrot percolation, where Galton-Watson trees (whose offspring…

动力系统 · 数学 2022-01-07 Yiftach Dayan

Iterated function systems (IFSs) are one of the most important tools for building examples of fractal sets exhibiting some kind of `approximate self-similarity'. Examples include self-similar sets, self-affine sets etc. A beautiful variant…

动力系统 · 数学 2024-07-12 Jonathan M. Fraser

In this paper, we determine the almost sure values of the $\Phi$-dimensions of random measures $\mu$ supported on random Moran sets in $\R^d$ that satisfy a uniform separation condition. This paper generalizes earlier work done on random…

经典分析与常微分方程 · 数学 2026-02-23 Kathryn E. Hare , Franklin Mendivil

In this paper we consider affine iterated function systems in locally compact non-Archimedean field $\mathbb{F}$. We establish the theory of singular value composition in $\mathbb{F}$ and compute box and Hausdorff dimension of self-affine…

经典分析与常微分方程 · 数学 2023-06-07 Yang Deng , Bing Li , Hua Qiu

This work is aimed by the spirit of 1946 Moran's Theorem, which ensures that both the box and the Hausdorff dimensions for any attractor could be calculated as the solution of an equation involving only its similarity factors. To achieve…

动力系统 · 数学 2016-01-19 M. Fernández-Martínez , Juan L. G. Guirao , M. A. Sánchez-Granero