Accesses to infinity from Fatou components

Barański, Krzysztof; Fagella, Núria; Jarque, Xavier; Karpińska, Bogusława

doi:10.1090/tran/6739

Accesses to infinity from Fatou components
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by Krzysztof Barański, Núria Fagella, Xavier Jarque and Bogusława Karpińska PDF

Trans. Amer. Math. Soc. 369 (2017), 1835-1867 Request permission

Abstract:

We study the boundary behaviour of a meromorphic map $f: \mathbb {C} \to \widehat {\mathbb {C}}$ on its simply connected invariant Fatou component $U$. To this aim, we develop the theory of accesses to boundary points of $U$ and their relation to the dynamics of $f$. In particular, we establish a correspondence between invariant accesses from $U$ to infinity or weakly repelling fixed points of $f$ and boundary fixed points of the associated inner function on the unit disc. We apply our results to describe the accesses to infinity from invariant Fatou components of the Newton maps.

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