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Quasiconformal maps with controlled Laplacian (1410.8439v2)

Published 30 Oct 2014 in math.CV

Abstract: We establish that every $K$-quasiconformal mapping of $w$ of the unit disk $\ID$ onto a $C2$-Jordan domain $\Omega$ is Lipschitz provided that $\Delta w\in Lp(\ID)$ for some $p>2$. We also prove that if in this situation $K\to 1$ with $|\Delta w|_{Lp(\ID)}\to 0$, and $\Omega \to \ID$ in $C{1,\alpha}$-sense with $\alpha>1/2,$ then the bound for the Lipschitz constant tends to $1$. In addition, we provide a quasiconformal analogue of the Smirnov absolute continuity result over the boundary.

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