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Maximizing Bernoulli measures and dimension gaps for countable branched systems

Part of: Probabilistic theory: distribution modulo $1$; metric theory of algorithms Smooth dynamical systems: general theory

Published online by Cambridge University Press:  26 May 2020

SIMON BAKER  and
NATALIA JURGA
SIMON BAKER
Affiliation:
School of Mathematics, University of Birmingham, Birmingham, B15 2TT, UK email [email protected]
NATALIA JURGA
Affiliation:
Mathematical Institute, University of St Andrews, KY16 9SS, UK email [email protected]
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Abstract

Kifer, Peres, and Weiss proved in [A dimension gap for continued fractions with independent digits. Israel J. Math.124 (2001), 61–76] that there exists $c_{0}>0$, such that $\dim \unicode[STIX]{x1D707}\leq 1-c_{0}$ for any probability measure $\unicode[STIX]{x1D707}$, which makes the digits of the continued fraction expansion independent and identically distributed random variables. In this paper we prove that amongst this class of measures, there exists one whose dimension is maximal. Our results also apply in the more general setting of countable branched systems.

Keywords

continued fractionsBernoulli measuresdimensions of measures

MSC classification

Primary: 11K55: Metric theory of other algorithms and expansions; measure and Hausdorff dimension 37C45: Dimension theory of dynamical systems
Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 41 , Issue 7 , July 2021 , pp. 1921 - 1939
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Copyright
© The Author(s) 2020. Published by Cambridge University Press

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