Minimal Ahlfors regular conformal dimension of coarse conformal dynamics on the sphere

Details Minimal Ahlfors regular conformal dimension of coarse conformal dynamics on the sphere Minimal Ahlfors regular conformal dimension of coarse conformal dynamics on the sphere

2011-03-21

arxiv.org/abs/1103.4019v1

Mathematics

Dynamical Systems

Scientific paper

We prove that if the Ahlfors regular conformal dimension $Q$ of a topologically cxc map on the sphere $f: S^2 \to S^2$ is realized by some metric $d$ on $S^2$, then either Q=2 and $f$ is topologically conjugate to a semihyperbolic rational map with Julia set equal to the whole Riemann sphere, or $Q>2$ and $f$ is topologically conjugate to a map which lifts to an affine expanding map of a torus whose differential has distinct real eigenvalues. This is an analog of a known result for Gromov hyperbolic groups with two-sphere boundary, and our methods apply to give a new proof.

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