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When do Two Rational Functions have Locally Biholomorphic Julia Sets?

Adventurous Berkeley Complex Dynamics May 02, 2022 - May 06, 2022

May 06, 2022 (09:30 AM PDT - 10:30 AM PDT)
Speaker(s): Romain Dujardin (Sorbonne Université)
Location: SLMath: Eisenbud Auditorium, Online/Virtual
Primary Mathematics Subject Classification
Secondary Mathematics Subject Classification No Secondary AMS MSC
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When Do Two Rational Functions Have Locally Biholomorphic Julia Sets?

Abstract

We address the following question, whose interest was recently renewed by problems arising in arithmetic dynamics and goes back to classical work of Fatou and Julia: under which conditions does there exist a local biholomorphism between the Julia sets of two given one-dimensional rational maps? In particular we find criteria ensuring that such a local isomorphism is induced by an algebraic correspondence. This is joint work with Charles Favre and Thomas Gauthier.

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When Do Two Rational Functions Have Locally Biholomorphic Julia Sets?

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