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Optimal bounds for the Kobayashi distance near $\mathcal C^2$-smooth boundary points

Complex Variables 2025-06-10 v1

Abstract

It is shown that the optimal upper and lower bounds for the Kobayashi distance near C2,α\mathcal C^{2,\alpha}-smooth strongly pseudoconvex boundary points obtained in L. Kosinski, N. Nikolov, A.Y. Okten: "Precise estimates of invariant distances on strongly pseudoconvex domains", Adv. Math. 478 (2025), 110388, remain true in the general C2\mathcal C^2 strongly pseudoconvex setting. In fact, the upper bound is extended to the general C1,1\mathcal C^{1,1}-smooth case. We also give upper and lower bounds for the Kobayashi distance near non-semipositive boundary points.

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Cite

@article{arxiv.2506.06507,
  title  = {Optimal bounds for the Kobayashi distance near $\mathcal C^2$-smooth boundary points},
  author = {Nikolai Nikolov and Pascal J. Thomas},
  journal= {arXiv preprint arXiv:2506.06507},
  year   = {2025}
}

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13 pages