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Bounded Fatou and Julia components of meromorphic functions

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Abstract We completely characterise the bounded sets that arise as components of the Fatou and Julia sets of meromorphic functions. On the one hand, we prove that a bounded domain is a Fatou component of some meromorphic function if and only if it is regular. On the other hand, we prove that a planar continuum is a Julia component of some meromorphic function if and only if it has empty interior. We do so by constructing meromorphic functions with wandering compacta using approximation theory.
Title: Bounded Fatou and Julia components of meromorphic functions
Description:
Abstract We completely characterise the bounded sets that arise as components of the Fatou and Julia sets of meromorphic functions.
On the one hand, we prove that a bounded domain is a Fatou component of some meromorphic function if and only if it is regular.
On the other hand, we prove that a planar continuum is a Julia component of some meromorphic function if and only if it has empty interior.
We do so by constructing meromorphic functions with wandering compacta using approximation theory.

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