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{\it Inversion of mappings}\\

{\bf Jan Mal\'y}\\
Charles University in Prague\\
{\tt maly@karlin.mff.cuni.cz}
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\noindent {\bf Abstract}: If $f\in W^{1,n-1}$ is a homeomorphism, then the
inverse mapping is in the $BV$ class and the formula on differentiation of
$f^{-1}$ can be derived. For Sobolev regularity of the inverse mapping the
assumption of finite distortion is relevant.  Based on joint results with
Katar{\'\i}na Bellov\'a, Marianna Cs\"ornyei, Stanislav Hencl, Pekka Koskela
and Jani Onninen. 

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