Quasihyperbolic geodesics in John domains in R^n

Details Quasihyperbolic geodesics in John domains in R^n Quasihyperbolic geodesics in John domains in R^n

2011-04-27

arxiv.org/abs/1104.5128v1

Mathematics

Functional Analysis

17 pages

Scientific paper

In this paper, we prove that if $D\subset R^n$ is a John domain which is homeomorphic to a uniform domain via a quasiconformal mapping, then each quasihyperbolic geodesic in $D$ is a cone arc, which shows that the answer to one of open problems raised by Heinonen in \cite{H} is affirmative. This result also shows that the answer to the open problem raised by Gehring, Hag and Martio in \cite{Gm} is positive for John domains which are homeomorphic to uniform domains via uasiconformal mappings. As an application, we prove that if $D\subset R^n$ is a John domain which is homeomorphic to a uniform domain, then $D$ must be a quasihyperbolic $(b, \lambda)$-uniform domain.

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