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Permutable quasiregular maps

Part of: Complex dynamical systems Entire and meromorphic functions, and related topics Geometric function theory

Published online by Cambridge University Press:  03 June 2021

ATHANASIOS TSANTARIS
ATHANASIOS TSANTARIS*
Affiliation:
School of Mathematical Sciences, University of Nottingham, NottinghamNG7 2RD. e-mail: Athanasios.Tsantaris@nottingham.ac.uk
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Abstract

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Let f and g be two quasiregular maps in $\mathbb{R}^d$ that are of transcendental type and also satisfy $f\circ g =g \circ f$ . We show that if the fast escaping sets of those functions are contained in their respective Julia sets then those two functions must have the same Julia set. We also obtain the same conclusion about commuting quasimeromorphic functions with infinite backward orbit of infinity. Furthermore we show that permutable quasiregular functions of the form f and $g = \phi \circ f$ , where $\phi$ is a quasiconformal map, have the same Julia sets and that polynomial type quasiregular maps cannot commute with transcendental type ones unless their degree is less than or equal to their dilatation.

MSC classification

Primary: 37F10: Polynomials; rational maps; entire and meromorphic functions 30C65: Quasiconformal mappings in $^n$, other generalizations
Secondary: 30D05: Functional equations in the complex domain, iteration and composition of analytic functions
Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 173 , Issue 1 , July 2022 , pp. 105 - 121
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Cambridge Philosophical Society

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