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Intermediate dimensions

Research output: Contribution to journalArticle

Author(s)

Kenneth John Falconer, Jonathan Fraser, Thomas Michael William Kempton

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Abstract

We introduce a continuum of dimensions which are 'intermediate' between the familiar Hausdorff and box dimensions. This is done by restricting the families of allowable covers in the definition of Hausdorff dimension by insisting that |U| ≤ |V|θ for all sets U, V used in a particular cover, where θ ∈ [0,1] is a parameter. Thus, when θ = 1 only covers using sets of the same size are allowable, and we recover the box dimensions, and when θ = 0 there are no restrictions, and we recover Hausdorff dimension. We investigate many properties of the intermediate dimension (as a function of θ), including proving that it is continuous on (0,1] but not necessarily continuous at 0, as well as establishing appropriate analogues of the mass distribution principle, Frostman's lemma, and the dimension formulae for products. We also compute, or estimate, the intermediate dimensions of some familiar sets, including sequences formed by negative powers of integers, and Bedford-McMullen carpets.
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Details

Original languageEnglish
Number of pages18
JournalMathematische Zeitschrift
VolumeFirst Online
Early online date26 Dec 2019
DOIs
Publication statusE-pub ahead of print - 26 Dec 2019

    Research areas

  • Hausdorff dimension, Box dimension, Self-affine carpet

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