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Equivalence of invariant metrics via Bergman kernel on complete noncompact Kähler manifolds - MaRDI portal

Equivalence of invariant metrics via Bergman kernel on complete noncompact Kähler manifolds (Q6583560)

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scientific article; zbMATH DE number 7892679
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English
Equivalence of invariant metrics via Bergman kernel on complete noncompact Kähler manifolds
scientific article; zbMATH DE number 7892679

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    Equivalence of invariant metrics via Bergman kernel on complete noncompact Kähler manifolds (English)
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    6 August 2024
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    In this paper, various invariant metrics are compared to each other based on curvature assumptions. There are pre-existing results of this nature but they seem to rely on negative curvature pinching. For a natural class of examples (the pseudconvex domains \(E_{p,\lambda}\) as in the notation of the paper), these pre-existing results are not applicable. The main theorem (Theorem A) states that for a noncompact Kähler manifold with a complete Bergman metric of bounded curvature, if the Bergman kernel is comparable to the volume form, there is a negatively curved Kähler-Einstein metric that is comparable to the given one, and under the hypothesis of embeddability into the unit ball (and negative holomorphic sectional curvature outside a compact set), the Kobayashi-Royden metric is comparable to the base metric. The proofs use Shi's derivative estimates for the Kähler-Ricci flow as well as producing a negatively curved metric using the hyperbolic metric on the ball. In the last section, some sort of a lower bound is provided on an integral involving the Caratheodory-Reiffen metric.
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    invariant metrics
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    Kähler-Ricci flow
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    Bergman metrics
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    Kobayashi-Royden metrics
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