On the Kodaira problem for uniruled Kähler spaces

On the Kodaira problem for uniruled Kähler spaces
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关于无规卡勒空间的 Kodaira 问题

DOI:
10.4310/arkiv.2020.v58.n2.a3
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发表时间:
2018
期刊:
arXiv: Algebraic Geometry
影响因子:
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通讯作者:
M. Schwald
M. Schwald
中科院分区:
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文献类型:
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作者:
Patrick Graf;M. Schwald

文献摘要

被引文献

相似文献

本文讨论了非圆K\“ahler空间中的科代拉问题.在Voisin的一个构造的基础上,我们给出了一个单圆K\“ahler空间X$的例子,使得$K_X$-MMP的每一次运行都立即终止于Mori纤维空间,但$X$不允许代数逼近。我们的例子还表明,对于Mori纤维化,基的可逼近性并不意味着全空间的可逼近性。
We discuss the Kodaira problem for uniruled K\"ahler spaces. Building on a construction due to Voisin, we give an example of a uniruled K\"ahler space $X$ such that every run of the $K_X$-MMP immediately terminates with a Mori fibre space, yet $X$ does not admit an algebraic approximation. Our example also shows that for a Mori fibration, approximability of the base does not imply approximability of the total space.