Teichmüller's Theorem in Higher Dimensions and Its Applications

: Anatoly Golberg, Toshiyuki Sugawa, Matti Vuorinen

Publisher: SPRINGER HEIDELBERG

: 2020

: Computational Methods and Function Theory

: COMPUTATIONAL METHODS AND FUNCTION THEORY

: COMPUT METH FUNCT TH

: 20

: 3-4

: 539

: 558

: 20

: 1617-9447

: 2195-3724

DOI: https://doi.org/10.1007/s40315-020-00340-x

: https://arxiv.org/abs/2006.01565

For a given ring (domain) in (R) over bar (n), we discuss whether its boundary components can be separated by an annular ring with modulus nearly equal to that of the given ring. In particular, we show that, for all n >= 3, the standard definition of uniformly perfect sets in terms of the Euclidean metric is equivalent to the boundedness of the moduli of the separating rings. We also establish separation theorems for a "half" of a ring. As applications of those results, we will prove boundary Holder continuity of quasiconformal mappings of the ball or the half space in R-n.

2006.01565.pdf