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arXiv 2302.09398math.CV
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直像层的对偶Nakano正性与奇异Nakano正性

Dual Nakano positivity and singular Nakano positivity of direct image sheaves

Yuta Watanabe

AI总结:

本文研究了扭曲相对典范丛直像层上的典范度量,证明了其在光滑无形变条件下的对偶Nakano半正性及奇异度量下的局部Nakano半正性。

摘要:

设$f:X\to Y$为满射射影映射,$L$为$X$上配备(奇异)半正Hermitian度量$h$的全纯线丛。本文通过研究扭曲相对典范丛$K_{X/Y}\otimes L\otimes\mathscr{I}(h)$直像层上的典范度量,得出:当$h$光滑且无$f$形变时,该度量具对偶Nakano半正性;当$h$奇异时,该度量在奇异意义下局部具Nakano半正性。

英文摘要:

Let $f:X\to Y$ be a surjective projective map and $L$ be a holomorphic line bundle on $X$ equipped with a (singular) semi-positive Hermitian metric $h$. In this article, by studying the canonical metric on the direct image sheaf of the twisted relative canonical bundles $K_{X/Y}\otimes L\otimes\mathscr{I}(h)$, we obtain that this metric has dual Nakano semi-positivity when $h$ is smooth and there is no deformation by $f$ and that this metric has locally Nakano semi-positivity in the singular sense when $h$ is singular.

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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