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Journal Articles Transactions of the American Mathematical Society Year : 2022

When do two rational functions have locally biholomorphic Julia sets?

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Abstract

In this note we address the following question, whose interest was recently renewed by problems arising in arithmetic dynamics: 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 extends and unifies classical results due to Baker, Beardon, Eremenko, Levin, Przytycki and others. The proof involves entire curves and positive currents.
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Dates and versions

hal-03521435 , version 1 (11-01-2022)
hal-03521435 , version 2 (17-01-2022)

Identifiers

  • HAL Id : hal-03521435 , version 2

Cite

Romain Dujardin, Charles Favre, Thomas Gauthier. When do two rational functions have locally biholomorphic Julia sets?. Transactions of the American Mathematical Society, 2022. ⟨hal-03521435v2⟩
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