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Local projectivity of Lagrangian fibrations on Hyperkähler manifolds
manuscripta mathematica ( IF 0.5 ) Pub Date : 2020-04-13 , DOI: 10.1007/s00229-020-01199-x
Frédéric Campana

We show that if $f:X\to B$ is a Lagrangian fibration from a compact connected K\"ahler hyperk\"ahler manifold $X$ onto a projective normal variety $B$, then $f$ is locally projective. This answers a question raised by L. Kamenova and strengthens a former result (\cite{Ca05}, Proposition 2.1), according to which the smooth fibres of $f$ are projective. The proof below does not use the known additional results concerning fibres and base in this specific context).

中文翻译:

拉格朗日纤维在 Hyperkähler 流形上的局部投影

我们证明,如果 $f:X\to B$ 是从紧连通的 K\"ahler hyperk\"ahler 流形 $X$ 到投影正态簇 $B$ 的拉格朗日纤维化,则 $f$ 是局部投影的。这回答了 L. Kamenova 提出的问题并加强了之前的结果(\cite{Ca05},命题 2.1),根据该结果,$f$ 的平滑纤维是投影的。下面的证明在此特定上下文中不使用有关纤维和碱的已知附加结果)。
更新日期:2020-04-13
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