Mathematics – Dynamical Systems
Scientific paper
2006-05-02
Acta Mathematica 203 (2009), no 2, 235 --267
Mathematics
Dynamical Systems
28 pages; 2 figures. Final version (October 2008). Various modificiations were made, including the introduction of Proposition
Scientific paper
10.1007/s11511-009-0042-y
We prove an analog of Boettcher's theorem for transcendental entire functions in the Eremenko-Lyubich class B. More precisely, let f and g be entire functions with bounded sets of singular values and suppose that f and g belong to the same parameter space (i.e., are *quasiconformally equivalent* in the sense of Eremenko and Lyubich). Then f and g are conjugate when restricted to the set of points which remain in some sufficiently small neighborhood of infinity under iteration. Furthermore, this conjugacy extends to a quasiconformal self-map of the plane. We also prove that this conjugacy is essentially unique. In particular, we show that an Eremenko-Lyubich class function f has no invariant line fields on its escaping set. Finally, we show that any two hyperbolic Eremenko-Lyubich class functions f and g which belong to the same parameter space are conjugate on their sets of escaping points.
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