English

Automorphisms of $\mathbb{C}^2$ with cycles of escaping Fatou components with hyperbolic limit sets

Dynamical Systems 2025-07-15 v1

Abstract

We study the stable dynamics of non-polynomial automorphisms of C2\mathbb{C}^2 of the form F(z,w)=(ezm+δe2πmiw,z)F(z,w)=(e^{-z^m}+ \delta e^{\frac{2 \pi}{m}i}\, w\,,\,z), with m2m\ge 2 a natural number and Rδ>2\mathbb{R}\ni\delta>2. If mm is even, there are m2\frac{m}{2} cycles of escaping Fatou components, all of period 2m2m. If mm is odd there are m12\frac{m-1}{2} cycles of escaping Fatou components of period 2m2m and just one cycle of escaping Fatou components of period mm. These maps have two distinct limit functions on each cycle, both of which have generic rank 1. Each Fatou component in each cycle has two disjoint and hyperbolic limit sets on the line at infinity, except for the Fatou components that belong to the unique cycle of period mm: the latter in fact have the same hyperbolic limit set on the line at infinity.

Keywords

Cite

@article{arxiv.2401.16903,
  title  = {Automorphisms of $\mathbb{C}^2$ with cycles of escaping Fatou components with hyperbolic limit sets},
  author = {Veronica Beltrami},
  journal= {arXiv preprint arXiv:2401.16903},
  year   = {2025}
}

Comments

25 pages, 2 figures. arXiv admin note: text overlap with arXiv:2308.05529