Intermediate dimensions

Kenneth John Falconer, Jonathan Fraser, Thomas Michael William Kempton

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)813–830
Number of pages18
JournalMathematische Zeitschrift
Volume296
Issue number1-2
Early online date26 Dec 2019
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Hausdorff dimension
  • Box dimension
  • Self-affine carpet

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