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We derive upper and lower bounds for the Assouad and lower dimensions of self-affine measures in $\mathbb{R}^d$ generated by diagonal matrices and satisfying suitable separation conditions. The upper and lower bounds always coincide for…

动力系统 · 数学 2024-03-20 Jonathan M. Fraser , István Kolossváry

We calculate the Assouad dimension of the self-affine carpets of Bedford and McMullen, and of Lalley and Gatzouras. We also calculate the conformal Assouad dimension of those carpets that are not self-similar.

度量几何 · 数学 2011-11-22 John M. Mackay

We derive the almost sure Assouad spectrum and quasi-Assouad dimension of random self-affine Bedford-McMullen carpets. Previous work has revealed that the (related) Assouad dimension is not sufficiently sensitive to distinguish between…

动力系统 · 数学 2023-06-22 Jonathan M. Fraser , 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

We calculate the Assouad and lower dimensions of graph-directed Bedford-McMullen carpets, which reflect the extreme local scaling laws of the sets, in contrasting with known results on Hausdorff and box dimensions. We also investigate the…

经典分析与常微分方程 · 数学 2024-11-26 Hua Qiu , Qi Wang , Shufang Wang

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

We study the Assouad and lower dimensions of self-affine sponges; the higher dimensional analogue of the planar self-affine carpets of Bedford and McMullen. Our techniques involve the weak tangents of Mackay and Tyson as well as regularity…

度量几何 · 数学 2017-03-30 Jonathan M. Fraser , Douglas C. Howroyd

The connections between quasi-Assouad dimension and tangents are studied. We apply these results to the calculation of the quasi-Assouad dimension for a class of planar self-affine sets. We also show that sets with decreasing gaps have…

经典分析与常微分方程 · 数学 2019-06-27 Ignacio García , Kathryn Hare

We study the fine scaling properties of planar self-affine carpets. For Gatzouras--Lalley carpets, we give a precise formula for maximal Hausdorff dimension of a tangent in terms of the Hausdorff dimension of the projection and the Assouad…

动力系统 · 数学 2024-10-28 Antti Käenmäki , Alex Rutar

We consider a class of planar self-affine sets which we call "box-like". A box-like self-affine set is the attractor of an iterated function system (IFS) of affine maps where the image of the unit square, [0,1]^2, under arbitrary…

度量几何 · 数学 2015-05-30 Jonathan M. Fraser

The Assouad dimension of the limit set of a geometrically finite Kleinian group with parabolics may exceed the Hausdorff and box dimensions. The Assouad \emph{spectrum} is a continuously parametrised family of dimensions which…

动力系统 · 数学 2024-03-20 Jonathan M. Fraser , Liam Stuart

We investigate several aspects of the Assouad dimension and the lower dimension, which together form a natural `dimension pair'. In particular, we compute these dimensions for certain classes of self-affine sets and quasi-self-similar sets…

度量几何 · 数学 2014-10-29 Jonathan M. Fraser

We study the dimension theory of limit sets of iterated function systems consisting of a countably infinite number of conformal contractions. Our focus is on the Assouad type dimensions, which give information about the local structure of…

动力系统 · 数学 2024-03-14 Amlan Banaji , Jonathan M. Fraser

For a self-similar set in $\mathbb{R}^d$ that is the attractor of an iterated function system that does not verify the weak separation property, Fraser, Henderson, Olson and Robinson showed that its Assouad dimension is at least $1$. In…

经典分析与常微分方程 · 数学 2020-07-02 Ignacio García

We investigate the dimension theory of inhomogeneous self-affine carpets. Through the work of Olsen, Snigireva and Fraser, the dimension theory of inhomogeneous self-similar sets is now relatively well-understood, however, almost no…

度量几何 · 数学 2013-07-26 Jonathan M. Fraser

We derive an upper bound for the Assouad dimension of visible parts of self-similar sets generated by iterated function systems with finite rotation groups and satisfying the open set condition. The bound is valid for all visible parts and…

动力系统 · 数学 2022-03-21 Esa Järvenpää , Maarit Järvenpää , Ville Suomala , Meng Wu

We introduce and study bi-Lipschitz-invariant dimensions that range between the box and Assouad dimensions. The quasi-Assouad dimensions and $\theta$-spectrum are other special examples of these intermediate dimensions. These dimensions are…

经典分析与常微分方程 · 数学 2020-09-09 Ignacio García , Kathryn Hare , Franklin Mendivil

In this paper, we study the dimension of planar self-affine sets, of which generating iterated function system (IFS) contains non-invertible affine mappings. We show that under a certain separation condition, the dimension equals to the…

动力系统 · 数学 2023-08-02 Balázs Bárány , Viktor Körtvélyesi

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 present several applications of the Assouad dimension, and the related quasi-Assouad dimension and Assouad spectrum, to the box and packing dimensions of orthogonal projections of sets. For example, we show that if the (quasi-)Assouad…

度量几何 · 数学 2021-07-02 Kenneth J. Falconer , Jonathan M. Fraser , Pablo Shmerkin
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