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Riemannian geometry of Kahler-Einstein currents II: an analytic proof of Kawamata's base point free theorem

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arxiv 1409.8374 v1 pith:HXON235B submitted 2014-09-30 math.DG math.AGmath.CV

classification math.DGmath.AGmath.CV
keywords canonicalriemanniananalytickahler-einsteinkawamatametricsproofsingular
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abstract

It is proved by Kawamata that the canonical bundle of a projective manifold is semi-ample if it is big and nef. We give an analytic proof using the Ricci flow, degeneration of Riemannian manifolds and $L^2$-theory. Combined with our earlier results, we construct unique singular Kahler-Einstein metrics with a global Riemannian structure on canonical models. Our approach can be viewed as the Kodaira embedding theorem on singular metric spaces with canonical Kahler metrics.

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  1. Nash entropy, Calabi energy and geometric regularization of singular K\"ahler metrics

    math.DG 2025-02 conditional novelty 8.0 of 10

    Singular Kähler metrics with Ricci curvature bounded below and rational cohomology class induce non-collapsed RCD spaces homeomorphic to the projective variety, under a resolution condition on the anti-canonical bundle.

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