A1 Refereed original research article in a scientific journal
Quasiconformal maps with bilipschitz or identity boundary values in Banach spaces
Authors: Yaxiang Li, Matti Vuorinen, Xiantao Wang
Publisher: Finnish Academy of Science and Letters
Publishing place: Finland
Publication year: 2014
Journal: Annales Academiae Scientiarum Fennicae. Mathematica
Journal name in source: Annales Academiae Scientiarum Fennicae Mathematica
Volume: 39
Issue: 1
First page : 905
Last page: 917
Number of pages: 13
ISSN: 1239-629X
DOI: https://doi.org/10.5186/aasfm.2014.3954
Web address : http://www.acadsci.fi/mathematica/Vol39/LiVuorinenWang.html
Suppose that E and E' denote real Banach spaces with dimension at least 2 and that D {subset of with not equal to} E and D' {subset of with not equal to} E' are uniform domains with homogeneously dense boundaries. We consider the class of all ϕ-FQC (freely ϕ-quasiconformal) maps of D onto D' with bilipschitz boundary values. We show that the maps of this class are η-quasisymmetric. As an application, we show that if D is bounded, then maps of this class satisfy a two sided Hölder condition. Moreover, replacing the class ϕ-FQC by the smaller class of M-QH maps, we show that M-QH maps with bilipschitz boundary values are bilipschitz. Finally, we show that if f is a ϕ-FQC map which maps D onto itself with identity boundary values, then there is a constant C, depending only on the function ϕ, such that for all x ∈ D, the quasihyperbolic distance satisfies k(x, f(x)) ≤ C.