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Generalized Hodge metrics and BCOV torsion on Calabi-Yau moduli
Journal article   Peer reviewed

Generalized Hodge metrics and BCOV torsion on Calabi-Yau moduli

Hao Fang and Zhiqin Lu
Journal für die reine und angewandte Mathematik, Vol.2005(588), pp.49-69
2005
DOI: 10.1515/crll.2005.2005.588.49

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Abstract

We establish an unexpected relation among the Weil-Petersson metric, the generalized Hodge metrics and the BCOV torsion. Using this relation, we prove that certain kind of moduli spaces of polarized Calabi-Yau manifolds do not admit complete subvarieties. That is, there is no complete smooth family for certain class of polarized Calabi-Yau manifolds. We also give an estimate of the complex Hessian of the BCOV torsion using the relation. After establishing a degenerate version of the Schwarz Lemma of Yau, we prove that the complex Hessian of the BCOV torsion is bounded by the Poincaré metric.

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