English

Non-uniform hyperbolicity in polynomial skew products

Dynamical Systems 2022-06-22 v5 Complex Variables

Abstract

Let f:C2C2f:\mathbb{C}^2\to \mathbb{C}^2 be a polynomial skew product which leaves invariant an attracting vertical line L L . Assume moreover ff restricted to LL is non-uniformly hyperbolic, in the sense that ff restricted to LL satisfies one of the following conditions: 1. fLf|_L satisfies Topological Collet-Eckmann and Weak Regularity conditions. 2. The Lyapunov exponent at every critical value point lying in the Julia set of fLf|_L exist and is positive, and there is no parabolic cycle. Under one of the above conditions we show that the Fatou set in the basin of LL coincides with the union of the basins of attracting cycles, and the Julia set in the basin of LL has Lebesgue measure zero. As an easy consequence there are no wandering Fatou components in the basin of LL.

Keywords

Cite

@article{arxiv.1909.06084,
  title  = {Non-uniform hyperbolicity in polynomial skew products},
  author = {Zhuchao Ji},
  journal= {arXiv preprint arXiv:1909.06084},
  year   = {2022}
}
R2 v1 2026-06-23T11:14:18.433Z