Kobayashi-Royden vs. Hahn pseudometric in ${\Bbb C}^2$

Witold Jarnicki

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arXiv · math/0009215

Kobayashi-Royden vs. Hahn pseudometric in ${\Bbb C}^2$

Witold Jarnicki

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Abstract

For a domain $D\subset{\Bbb C}$ the Kobayashi--Royden $κ$ and Hahn $h$ pseudometrics are equal iff $D$ is simply connected. Overholt showed that for $D\subset{\Bbb C}^n$, $n\geq3$, we have $h_D\equivκ_D$. Let $D_1,D_2\subset{\Bbb C}$. The aim of this paper is to show that $h_{D_1\times D_2}\equivκ_{D_1\times D_2}$ iff at least one of $D_1$, $D_2$ is simply connected or biholomorphic to ${\Bbb C}\setminus\{0\}$. In particular, there are domains $D\subset{\Bbb C}^2$ for which $h_D\not\equivκ_D$.

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BibTeX RIS

Witold Jarnicki. 2000-10-24. Kobayashi-Royden vs. Hahn pseudometric in ${\Bbb C}^2$. https://arxiv.org/abs/math/0009215

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