Quasisymmetries of the Basilica and the Thompson Group

Quasisymmetries of the Basilica and the Thompson Group

We give a description of the group of all quasisymmetric self-maps of the Julia set of f ( z ) =  z 2 −1 that have orientation preserving homeomorphic extensions to the whole plane. More precisely, we prove that this group is the uniform closure of the group generated by the Thompson group of the un...

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Veröffentlicht in:Geometric and functional analysis 2018-06, Vol.28 (3), p.727-754, Article 727
Hauptverfasser: Lyubich, Mikhail, Merenkov, Sergei
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Mathematics and Statistics
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description We give a description of the group of all quasisymmetric self-maps of the Julia set of f ( z ) =  z 2 −1 that have orientation preserving homeomorphic extensions to the whole plane. More precisely, we prove that this group is the uniform closure of the group generated by the Thompson group of the unit circle and an inversion. Moreover, this result is quantitative in the sense that distortions of the approximating maps are uniformly controlled by the distortion of the given map.
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Cathedrals
Mathematics
Mathematics and Statistics
title Quasisymmetries of the Basilica and the Thompson Group
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