English

Continuity of fractal dimensions in conservative generic Markov and Lagrange dynamical spectra

Dynamical Systems 2025-11-26 v2

Abstract

Let φ0\varphi_0 be a smooth conservative diffeomorphism of a compact surface SS and let Λ0\Lambda_0 be a transitive horseshoe of φ0\varphi_0. Given a smooth real function ff defined in SS and a small smooth conservative perturbation φ\varphi of φ0\varphi_0, let Lφ,fL_{\varphi, f} and Mφ,fM_{\varphi, f} be respectively the Lagrange and Markov spectra associated to the hyperbolic continuation Λ(φ)\Lambda(\varphi) of the horseshoe Λ0\Lambda_0 and ff. We show that for generic choices of φ\varphi and ff, the Hausdorff dimension of the sets Lφ,f(,t)L_{\varphi, f}\cap (-\infty, t) and Mφ,f(,t)M_{\varphi, f}\cap (-\infty, t) are equal and determine a continuous function as tRt\in \mathbb{R} varies; generalizing then the Cerqueira-Matheus-Moreira theorem to horseshoes with arbitrary Hausdorff dimension.

Keywords

Cite

@article{arxiv.2305.07819,
  title  = {Continuity of fractal dimensions in conservative generic Markov and Lagrange dynamical spectra},
  author = {Davi Lima and Carlos Gustavo Moreira and Christian Camilo Silva Villamil},
  journal= {arXiv preprint arXiv:2305.07819},
  year   = {2025}
}

Comments

24 pages,2 figures