Bounds for Invariant Distances on Pseudoconvex Levi Corank One Domains and Applications

TL;DR

This paper establishes lower bounds for invariant distances like Carathéodory, Kobayashi, and Bergman on pseudoconvex Levi corank one domains, linking these bounds to boundary geometry and exploring applications in invariant metrics and isometries.

Contribution

It provides new lower bounds for invariant distances on Levi corank one domains and applies these results to analyze invariant metrics, boundary behavior, and isometries.

Findings

Lower bounds for Carathéodory, Kobayashi, and Bergman distances in Levi corank one domains.

Characterization of Kobayashi metric balls near the boundary in Euclidean terms.

Insights into boundary behavior of Kobayashi isometries on such domains.

Abstract

Let $D \subset \mathbb{C}^n$ be a smoothly bounded pseudoconvex Levi corank one domain with defining function $r$, i.e., the Levi form $\partial \bar {\partial} r$ of the boundary $\partial D$ has at least $(n - 2)$ positive eigenvalues everywhere on $\partial D$. The main goal of this article is to obtain a lower bound for the Carath\'{e}odory, Kobayashi and the Bergman distance between a given pair of points $p, q \in D$ in terms of parameters that reflect the Levi geometry of $\partial D$ and the distance of these points to the boundary. Applications include an understanding of Fridman's invariant for the Kobayashi metric on Levi corank one domains, a description of the balls in the Kobayashi metric on such domains that are centered at points close to the boundary in terms of Euclidean data and the boundary behaviour of Kobayashi isometries from such domains.