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Some questions of Beurling-Ahlfors’ extension. (Chinese. English summary) Zbl 0971.30016
The paper studied a new kind of quasiconformal extension of quasisymmetric functions on the real line. The extension is similar to that of Beurling and Ahlfors with $$1/2$$ replaced by a function $$(1/T)_{\chi[QT]}$$. Some estimates of the maximal dilatation of the extension were given.
##### MSC:
 30C62 Quasiconformal mappings in the complex plane