Geometric construction of quasiconformal mappings in the Heisenberg group

Author:

Timsit Robin

Abstract

In this paper, we are interested in the construction of quasiconformal mappings between domains of the Heisenberg group H \mathbf {H} that minimize a mean distortion functional. We propose to construct such mappings by considering a corresponding problem between domains of Poincaré half-plane H \mathbb H and then, lifting every of its solutions to H \mathbf H . The first map we construct is a quasiconformal map between two cylinders. We explain the method used to find it and prove its uniqueness up to rotations. Then, we give geometric conditions which ensure that a minimizer (in H \mathbf {H} ) comes as a lift of a minimizer between domains of H \mathbb H . Finally, as a non-trivial example of the generalization, we manage to reconstruct the map from [Ann. Acad. Sci. Fenn. Math. 38 (2013), pp. 149–180] between two spherical annuli and prove its uniqueness as a minimizer.

Publisher

American Mathematical Society (AMS)

Subject

Geometry and Topology

Reference15 articles.

1. Van Nostrand Mathematical Studies, No. 10;Ahlfors, Lars V.,1966

2. Modulus method and radial stretch map in the Heisenberg group;Balogh, Zoltán M.;Ann. Acad. Sci. Fenn. Math.,2013

3. Uniqueness of minimisers for a Grötzsch-Belinskiĭ type inequality in the Heisenberg group;Balogh, Zoltán M.;Conform. Geom. Dyn.,2015

4. Lifts of Lipschitz maps and horizontal fractals in the Heisenberg group;Balogh, Zoltán M.;Ergodic Theory Dynam. Systems,2006

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