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arXiv 0710.4579math.DGmath.AG
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当Kahler类退化时Calabi-Yau度量的极限

Limits of Calabi-Yau metrics when the Kahler class degenerates

Valentino Tosatti

摘要:

本文研究了射影Calabi-Yau流形上Ricci平坦Kahler度量族在Kahler类退化到充锥边界时的行为。证明了当极限类较大且nef时,Ricci-平坦度量在一个子簇外的紧集上光滑收敛到极限不完全Ricci-平坦度量。极限也可以从代数几何学中理解。

英文摘要:

We study the behaviour of families of Ricci-flat Kahler metrics on a projective Calabi-Yau manifold when the Kahler classes degenerate to the boundary of the ample cone. We prove that if the limit class is big and nef the Ricci-flat metrics converge smoothly on compact sets outside a subvariety to a limit incomplete Ricci-flat metric. The limit can also be understood from algebraic geometry.

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