Asymptotic Conformality of the Barycentric Extension of Quasiconformal Maps
Abstract
We first remark that the complex dilatation of a quasiconformal homeomorphism of a hyperbolic Riemann surface $R$ obtained by the barycentric extension due to Douady-Earle vanishes at any cusp of $R$. Then we give a new proof, without using the Bers embedding, of a fact that the quasiconformal homeomorphism obtained by the barycentric extension from an integrable Beltrami coefficient on $R$
is asymptotically conformal.
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