On geometric properties of holomorphic isometries between bounded symmetric domains

Shan Tai Chan

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arXiv · 2410.13750

On geometric properties of holomorphic isometries between bounded symmetric domains

Shan Tai Chan

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Abstract

We study holomorphic isometries between bounded symmetric domains with respect to the Bergman metrics up to a normalizing constant. In particular, we first consider a holomorphic isometry from the complex unit ball into an irreducible bounded symmetric domain with respect to the Bergman metrics. In this direction, we show that images of (nonempty) affine-linear sections of the complex unit ball must be the intersections of the image of the holomorphic isometry with certain affine-linear subspaces. We also construct a surjective holomorphic submersion from a certain subdomain of the target bounded symmetric domain onto the complex unit ball such that the image of the holomorphic isometry lies inside the subdomain and the holomorphic isometry is a global holomorphic section of the holomorphic submersion. This construction could be generalized to any holomorphic isometry between bounded symmetric domains with respect to the \emph{canonical Kähler metrics}. Using some classical results for complex-analytic subvarieties of Stein manifolds, we have obtained further geometric results for images of such holomorphic isometries.

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Shan Tai Chan. 2025-04-10. On geometric properties of holomorphic isometries between bounded symmetric domains. https://arxiv.org/abs/2410.13750

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