English

Dimensions and entropies for an expansive homeomorphism

Dynamical Systems 2025-09-09 v2

Abstract

For an expansive homeomorphism, we investigate the relationship among dimension, entropy, and Lyapunov exponents. Motivated by Young's formula for surface diffeomorphisms, which links dimension and measure-theoretic entropy with hyperbolic ergodic measures, we construct the hyperbolic metric with two distinct Lyapunov exponents logb>0>loga\log b>0>-\log a. We then examine the relationships between various types of entropies (entropy, rr-neutralized entropy, and α\alpha-estimating entropy) and dimensions. We further prove the Eckmann-Ruelle Conjecture for expansive topological dynamical systems with hyperbolic metrics. Additionally, we establish variational principles for these entropy quantities.

Keywords

Cite

@article{arxiv.2502.18162,
  title  = {Dimensions and entropies for an expansive homeomorphism},
  author = {Ercai Chen and Tassilo Küpper and Yunxiang Xie},
  journal= {arXiv preprint arXiv:2502.18162},
  year   = {2025}
}