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Random local complex dynamics

Part of: Complex dynamical systems Random dynamical systems

Published online by Cambridge University Press:  26 December 2018

LORENZO GUERINI  and
HAN PETERS
LORENZO GUERINI
Affiliation:
University of Amsterdam, Mathematics, Science Park 904, Floor C3, Amsterdam, Netherlands, 1098XH email [email protected], [email protected]
HAN PETERS
Affiliation:
University of Amsterdam, Mathematics, Science Park 904, Floor C3, Amsterdam, Netherlands, 1098XH email [email protected], [email protected]
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Abstract

The study of the dynamics of an holomorphic map near a fixed point is a central topic in complex dynamical systems. In this paper, we will consider the corresponding random setting: given a probability measure $\unicode[STIX]{x1D708}$ with compact support on the space of germs of holomorphic maps fixing the origin, we study the compositions $f_{n}\circ \cdots \circ f_{1}$, where each $f_{i}$ is chosen independently with probability $\unicode[STIX]{x1D708}$. As in the deterministic case, the stability of the family of the random iterates is mostly determined by the linear part of the germs in the support of the measure. A particularly interesting case occurs when all Lyapunov exponents vanish, in which case stability implies simultaneous linearizability of all germs in $\text{supp}(\unicode[STIX]{x1D708})$.

Keywords

complex dynamicsrandom dynamicslocal dynamics

MSC classification

Primary: 37F50: Small divisors, rotation domains and linearization; Fatou and Julia sets
Secondary: 37H10: Generation, random and stochastic difference and differential equations
Type
Original Article
Information
Ergodic Theory and Dynamical Systems , Volume 40 , Issue 8 , August 2020 , pp. 2156 - 2182
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Copyright
© Cambridge University Press, 2018

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