English

Rotation domains and Stable Baker omitted value

Dynamical Systems 2021-01-07 v1 Complex Variables

Abstract

A Baker omitted value, in short \textit{bov} of a transcendental meromorphic function ff is an omitted value such that there is a disk DD centered at the bov for which each component of the boundary of f1(D)f^{-1}(D) is bounded. Assuming all the iterates fnf^n are analytic in a neighborhood of its bov, this article proves that the number of Herman rings of a particular period is finite and every Julia component intersects the boundaries of at most finitely many Herman rings. Further, if the bov is the only limit point of the critical values then it is shown that ff has infinitely many repelling fixed points. If a repelling periodic point of period pp is on the boundary of a pp-periodic rotation domain then the periodic point is shown to be on the boundary of infinitely many Fatou components. Under additional assumptions on the critical points, a sufficient condition is found for a Julia component to be singleton. As a consequence, it is proved that if the boundary of a wandering domain WW accumulates at some point of the plane under the iteration of ff then each limit of fnf^n on WW is either a parabolic periodic point or in the ω\omega-limit set of recurrent critical points. Using the same ideas, the boundary of rotation domains are shown to be in the ω\omega-limit set of recurrent critical points.

Keywords

Cite

@article{arxiv.2101.01951,
  title  = {Rotation domains and Stable Baker omitted value},
  author = {Subhasis Ghora and Tarakanta Nayak},
  journal= {arXiv preprint arXiv:2101.01951},
  year   = {2021}
}
R2 v1 2026-06-23T21:49:56.245Z