Special Session 138: Recent advances in Fractal Geometry, Dynamical Systems, and Positive Operators

Ergodic theory on coded shift spaces
Christian Wolf
CUNY Graduate Center
USA
Co-Author(s):    Tamara Kucherenko, Martin Schmoll
Abstract:
In this talk we present results about ergodic-theoretic properties of coded shift spaces. A coded shift space is defined as a closure of all bi-infinite concatenations of words from a fixed countable generating set. We derive sufficient conditions for the uniqueness of measures of maximal entropy and equilibrium states of H\{o}lder continuous potentials based on the partition of the coded shift into its concatenation set (sequences that are concatenations of generating words) and its residual set (sequences added under the closure). We also discuss flexibility results for the entropy on the sequential and residual set. Finally, we present a local structure theorem for intrinsically ergodic coded shift spaces which shows that our results apply to a larger class of coded shift spaces compared to previous works by Climenhaga, Climenhaga and Thompson, and Pavlov.