Iterated function systems with super-exponentially close cylinders II

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Abstract

Until recently, it was an important open problem in Fractal Geometry to determine whether there exists an iterated function system acting on with no exact overlaps for which cylinders are super-exponentially close at all small scales. Iterated function systems satisfying these properties were shown to exist by the author and by Bárány and Käenmäki. In this paper we prove a general theorem on the existence of such iterated function systems within a parameterised family. This theorem shows that if a parameterised family contains two independent subfamilies, and the set of parameters that cause exact overlaps satisfies some weak topological assumptions, then the original family will contain an iterated function system satisfying the desired properties. We include several explicit examples of parameterised families to which this theorem can be applied.
Original languageEnglish
Pages (from-to)245-256
JournalProceedings of the American Mathematical Society
Volume150
Issue number1
Early online date12 Oct 2021
DOIs
Publication statusPublished - Jan 2022

Keywords

  • Overlapping iterated function systems
  • self-similar measures
  • exact overlaps

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