Higher direct images of log canonical divisors and positivity theorems

Higher direct images of log canonical divisors and positivity theorems
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对数正则除数和正性定理的更高直接图像

DOI:
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发表时间:
2003
期刊:
arXiv: Algebraic Geometry
影响因子:
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通讯作者:
O. Fujino
O. Fujino
中科院分区:
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文献类型:
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作者:
O. Fujino

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本文研究了对数典型因子的高次直象。在重新表述了Koll 'ar的无挠定理之后,我们讨论了混合Hodge结构的梯度极化变化的Hodge滤子的正则扩张与对数正则因子的高阶直像之间的关系.作为推论,我们得到了Fujita-Kawamata半正性定理的对数形式。利用这个半正性定理,我们推广了Kawamata的正性定理,并将其应用于对数标准丛公式的研究。最后一节是附录,这是Morihiko Saito的成果。
In this paper, we investigate higher direct images of log canonical divisors. After we reformulate Koll\'ar's torsion-free theorem, we treat the relationship between higher direct images of log canonical divisors and the canonical extensions of Hodge filtration of gradedly polarized variations of mixed Hodge structures. As a corollary, we obtain a logarithmic version of Fujita-Kawamata's semi-positivity theorem. By this semi-positivity theorem, we generalize Kawamata's positivity theorem and apply it to the study of a log canonical bundle formula. The final section is an appendix, which is a result of Morihiko Saito.
DOI: 10.1090/pspum/052.2
发表时间: 1991
期刊: --
影响因子: --
作者:
Eric Bedford;J. D'Angelo;R. Greene;S. Krantz
通讯作者: Eric Bedford;J. D'Angelo;R. Greene;S. Krantz