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arXiv 0905.4718math.DG
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Ricci平坦Kahler度规的绝热极限

Adiabatic limits of Ricci-flat Kahler metrics

Valentino Tosatti

摘要:

研究了全纯纤维化的全空间为Calabi-Yau流形上当纤维体积趋于零时Ricci平坦Kahler度量的绝热极限。通过对相应的复Monge-Ampere方程建立新的先验估计,证明了Ricci平坦度规在纤维化的基础上(远离奇异纤维)坍缩为一个度规.该度量具有等于Weil-Petersson度量的里奇曲率,Weil-Petersson度量测量Calabi-Yau纤维的复结构的变化。这将Gross-Wilson的K3曲面的结果推广到更高的维度。

英文摘要:

We study adiabatic limits of Ricci-flat Kahler metrics on a Calabi-Yau manifold which is the total space of a holomorphic fibration when the volume of the fibers goes to zero. By establishing some new a priori estimates for the relevant complex Monge-Ampere equation, we show that the Ricci-flat metrics collapse (away from the singular fibers) to a metric on the base of the fibration. This metric has Ricci curvature equal to a Weil-Petersson metric that measures the variation of complex structure of the Calabi-Yau fibers. This generalizes results of Gross-Wilson for K3 surfaces to higher dimensions.

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