Conformally invariant complete metrics
Conformally invariant complete metrics
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DOI:
10.1017/s030500412200024x
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发表时间:
2020-09
影响因子:
0.8
通讯作者:
T. Sugawa;M. Vuorinen;Tanran Zhang
中科院分区:
文献类型:
--
作者:
T. Sugawa;M. Vuorinen;Tanran Zhang
Abstract For a domain G in the one-point compactification $\overline{\mathbb{R}}^n = {\mathbb{R}}^n \cup \{ \infty\}$ of ${\mathbb{R}}^n, n \geqslant 2$ , we characterise the completeness of the modulus metric $\mu_G$ in terms of a potential-theoretic thickness condition of $\partial G\,,$ Martio’s M-condition [ 35 ]. Next, we prove that $\partial G$ is uniformly perfect if and only if $\mu_G$ admits a minorant in terms of a Möbius invariant metric. Several applications to quasiconformal maps are given.