English

Sequence entropy and independence in free and minimal actions

Dynamical Systems 2025-04-02 v1

Abstract

For every countable infinite group that admits Z\mathbb{Z} as a homomorphic image, we show that for each mNm\in\mathbb{N}, there exists a minimal action whose topological sequence entropy is log(m)\log(m). Furthermore, for every countable infinite group GG that contains a finite index normal subgroup GG' isomorphic to Zr\mathbb{Z}^r, and for every mNm\in \mathbb{N}, we found a free minimal action with topological sequence entropy log(n)\log(n), where mnm2r[G:G]m\leq n\leq m^{2^r[G:G']}. In both cases, we also show that the aforementioned minimal actions admit non-trivial independence tuples of size nn but do not admit non-trivial independence tuples of size n+1n+1 for some nmn\geq m.

Keywords

Cite

@article{arxiv.2504.00960,
  title  = {Sequence entropy and independence in free and minimal actions},
  author = {Jaime Gómez and Irma León-Torres and Víctor Muñoz-López},
  journal= {arXiv preprint arXiv:2504.00960},
  year   = {2025}
}

Comments

26 pages

R2 v1 2026-06-28T22:42:41.123Z