Energy-minimal diffeomorphisms between doubly connected Riemann surfaces
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Abstract
Let \(M\) and \(N\) be doubly connected Riemann surfaces with boundaries and with nonvanishing conformal metrics \(\sigma \) and \(\rho \) respectively, and assume that \(\rho \) is a smooth metric with bounded Gauss curvature \({\mathcal {K}}\) and finite area. The paper establishes the existence of homeomorphisms between \(M\) and \(N\) that minimize the Dirichlet energy. Among all homeomorphisms \(f :M{\overset{{}_{ \tiny {\mathrm{onto}} }}{\longrightarrow }} N\) between doubly connected Riemann surfaces such that \({{\mathrm{Mod\,}}}M \leqslant {{\mathrm{Mod\,}}}N\) there exists, unique up to conformal automorphisms of M, an energy-minimal diffeomorphism which is a harmonic diffeomorphism. The results improve and extend some recent results of Iwaniec et al. (Invent Math 186(3):667–707, 2011), where the authors considered bounded doubly connected domains in the complex plane w.r. to Euclidean metric.
Mathematics Subject Classification (2000)
Primary 58E20 Secondary 30C62 31A05Notes
Acknowledgments
I thank Professor Leonid Kovalev for very useful discussion about the subject of this paper.
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