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arXiv math/9901069math.DGmath.AG
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复拉格朗日子流形的模空间

The moduli space of complex Lagrangian submanifolds

N J Hitchin

摘要:

继早期的论文中的微分几何结构的特殊拉格朗日子流形的模空间的卡-丘流形,我们遵循类似的方法,紧凑的复杂的拉格朗日子流形的(凯勒)复杂的辛流形。自然的几何结构上的模空间是一个特殊的凯勒度量,但我们提供了一个不同的观点对局部微分几何的这些,基于结构的子流形的$V\times V$(其中$V$是一个辛向量空间),这是拉格朗日关于两个常数辛形式。作为一个应用程序,我们使用这个观点如何hyperkähler度量Cecotti,费拉拉和Girardello相关联的一个特殊的Kähler结构适合到勒让德变换建设的Lindström和Ro \v cek。

英文摘要:

Following an earlier paper on the differential-geometric structure of the moduli space of special Lagrangian submanifolds in a Calabi-Yau manifold, we follow an analogous approach for compact complex Lagrangian submanifolds of a (Kählerian) complex symplectic manifold. The natural geometric structure on the moduli space is a special Kähler metric, but we offer a different point of view on the local differential geometry of these, based on the structure of a submanifold of $V\times V$ (where $V$ is a symplectic vector space) which is Lagrangian with respect to two constant symplectic forms. As an application, we show using this point of view how the hyperkähler metric of Cecotti, Ferrara and Girardello associated to a special Kähler structure fits into the Legendre transform construction of Lindström and Ro\v cek.

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