An egg-yolk principle and exponential integrability for quasiregular mappings

Details An egg-yolk principle and exponential integrability for quasiregular mappings An egg-yolk principle and exponential integrability for quasiregular mappings

2006-07-13

arxiv.org/abs/math/0607319v1

Mathematics

Complex Variables

16 pages

Scientific paper

Quasiregular mappings $f:\Omega\subset\R^{n}\to \R^{n}$ are a natural generalization of analytic functions from complex analysis and provide a theory which is rich with new phenomena. In this paper we extend a well-known result of A.~Chang and D.~Marshall on exponential integrability of analytic functions in the disk, to the case of quasiregular mappings defined in the unit ball of $\R^n$. To this end, we first establish an ``egg-yolk'' principle for such maps, which extends a recent result of the first author. Our work leaves open an interesting problem regarding $n$-harmonic functions.

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