7 citations · 37 across the 24 of their papers we have counts for
9 papers · 1 filter
Uniformizing non-proper Gromov Hyperbolic Spaces
Shu-Jing Gao, Chang-Yu Guo, Miao He
In this paper, we extend a large part of the uniformization theory of Bonk-Heinonen-Koskela [Asterisque 2001] to length spaces that are not necessarily proper or geodesic. Among ot…
A note to "Radial limits of quasiregular Local Homeomorphisms''
Chang-Yu Guo, Yi Xuan
In this short note, we consider quasiregular local homeomorphisms on uniform domains. We prove that such mappings always can be extended to some boundary points along John curves,…
Generalized quasidisks and conformality: progress and challenges
Chang-Yu Guo, Haiqing Xu
In this notes, we survey the recent developments on theory of generalized quasidisks. Based on the more or less standard techniques used earlier, we also provide some minor improve…
The theory of quasiregular mappings in metric spaces: progress and challenges
Chang-Yu Guo
We survey the recent developments in the theory of quasireg- ular mappings in metric spaces. In particular, we study the geometric porosity of the branch set of quasiregular mappin…
Geometric function theory: the art of pullback factorization
Chang-Yu Guo, Marshall Williams
In this paper, we develop the foundations of the theory of quasiregular mappings in general metric measure spaces. In particular, nine definitions of quasiregularity for a discrete…
Mappings of finite distortion: boundary extensions in uniform domains
Tuomo Akkinen, Chang-Yu Guo
In this paper, we consider mappings on uniform domains with exponentially integrable distortion whose Jacobian determinants are integrable. We show that such mappings can be extend…
Quasiregular mappings between equiregular SubRiemannian manifolds
Chang-Yu Guo, Sebastiano Nicolussi Golo, Marshall Williams +1
In this paper, we provide an alternative appraoch to an expectaion of Fässler et al [J. Geom. Anal. 2016] by showing that a metrically quasiregular mapping between two equiregular…
Sharpness of uniform continuity of quasiconformal mappings onto s-John domains
Chang-Yu Guo, Pekka Koskela
We construct examples to show the sharpness of uniform continuity of quasiconformal mappings onto -John domains. Our examples also give a negative answer to a prediction in [7].
Mappings of finite distortion of polynomial type
Changyu Guo
Suppose that $f: \bR^n\to\bR^n$ is a mapping of -bounded -mean distortion for some . We prove the equivalence of the following properties of : doubling condition fo…