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arXiv 1409.0127math.AGmath.DG
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Calabi-Yau三重和BCOV不变量的退化

Degenerations of Calabi-Yau threefolds and BCOV invariants

Ken-Ichi Yoshikawa

摘要:

Bershadsky-Cecotti-Ooguri-Vafa在1993年和1994年发表的论文中,通过用两种不同的方式表示某个物理量,发现了Ray-Singer解析挠率与Calabi-Yau三重椭圆瞬子数之间的一个显著等价性。在他们的发现之后,在2008年发表的一篇论文中,构造了对应于物理量的Calabi-Yau三重的全纯挠不变量,称为BCOV不变量。本文研究了Calabi-Yau三重代数单参数退化的BCOV不变量的渐近性质。证明了对数发散系数的合理性,并利用给定族的半稳定约化给出了其几何表达式。

英文摘要:

In their papers published in 1993 and 1994, by expressing certain physical quantity in two distinct ways, Bershadsky-Cecotti-Ooguri-Vafa discovered a remarkable equivalence between Ray-Singer analytic torsion and elliptic instanton numbers for Calabi-Yau threefolds. After their discovery, in a paper published in 2008, a holomorphic torsion invariant for Calabi-Yau threefolds corresponding to the physical quantity was constructed and is called BCOV invariant. In this article, we study the asymptotic behavior of BCOV invariants for algebraic one-parameter degenerations of Calabi-Yau threefolds. We prove the rationality of the coefficient of logarithmic divergence and give its geometric expression by using a semi-stable reduction of the given family.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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