论文标题

在全态拟合歧管和退化扭曲变形上,Lagrangian振动的部分

Sections of Lagrangian fibrations on holomorphically symplectic manifolds and degenerate twistorial deformations

论文作者

Bogomolov, Fedor, Deev, Rodion, Verbitsky, Misha

论文摘要

令$(m,i,ω)$为一个带有holomorphic lagrangian纤维化$π的全态性符号歧管:\; m \ mapsto x $和$η$ a $ x $上的hodge类型(1,1)+(2,0)的封闭形式。我们证明$ω':=ω+π^*η$再次是一种全态形式的形式,对于另一个复杂的结构$ i'$,它是由$ω'$唯一确定的。复杂结构的相应变形称为“退化扭曲变形”。地图$π$相对于这种新的复杂结构是圆锥形的,$ x $,$π$的纤维保留了与以前相同的复杂结构。令$ s $为$π$的平滑部分。我们证明存在一个退化的扭曲变形$(m,i',ω')$,使得$ s $是一个全态部分。

Let $(M,I, Ω)$ be a holomorphically symplectic manifold equipped with a holomorphic Lagrangian fibration $π:\; M \mapsto X$, and $η$ a closed form of Hodge type (1,1)+(2,0) on $X$. We prove that $Ω':=Ω+π^* η$ is again a holomorphically symplectic form, for another complex structure $I'$, which is uniquely determined by $Ω'$. The corresponding deformation of complex structures is called "degenerate twistorial deformation". The map $π$ is holomorphic with respect to this new complex structure, and $X$ and the fibers of $π$ retain the same complex structure as before. Let $s$ be a smooth section of of $π$. We prove that there exists a degenerate twistorial deformation $(M,I', Ω')$ such that $s$ is a holomorphic section.

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