Dynamical diophantine approximation
Author
Summary, in English
Let $mu$ be a Gibbs measure of the doubling map $T$ of the circle. For a $mu$-generic point $x$ and a given sequence ${r_n} subset R^+$, consider the intervals $(T^nx - r_n pmod 1, T^nx + r_n pmod 1)$. In analogy to the classical Dvoretzky covering of the circle we study the covering properties of this sequence of intervals. This study is closely related to the local entropy function of the Gibbs measure and to hitting times for moving targets. A mass transference principle is obtained for Gibbs measures which are multifractal. Such a principle was shown by Beresnevich and Velani cite{BV} only for monofractal measures. In the symbolic language we completely describe the combinatorial structure of a typical relatively short sequence, in particular we can describe the occurrence of ''atypical'' relatively long words. Our results have a direct and deep number-theoretical interpretation via inhomogeneous diadic diophantine approximation by numbers belonging to a given (diadic) diophantine class.
Department/s
- Mathematics (Faculty of Engineering)
- Dynamical systems
Publishing year
2008
Language
English
Publication/Series
Historielärarnas Förenings Årsskrift
Links
Document type
Journal article
Publisher
Historielärarnas förening
Topic
- Mathematics
Keywords
- Dynamical Systems (math.DS)
- Number Theory (math.NT)
- Probability (math.PR)
Status
Submitted
Research group
- Dynamical systems
ISBN/ISSN/Other
- ISSN: 0439-2434