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Approximation of the Hersch-Pfluger distortion function. (English) Zbl 0793.30013
This paper aims at giving a method of approximating the distortion function $$\Phi_ K$$ by means of elementary functions. As a consequence, new bounds for the function $$\Phi_ K$$ are established. Moreover, the $$n$$-dimensional counterpart $$\Phi_{K,n}$$ of $$\Phi_ K$$, $$n=2,3,\dots$$ is considered.
Reviewer: D.Partyka

##### MSC:
 30C62 Quasiconformal mappings in the complex plane 41A25 Rate of convergence, degree of approximation
##### Keywords:
distortion function
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