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arXiv 1606.08158math.DG
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四维流形上的Kahler和辛结构与hyperKahler几何

Kahler and symplectic structures on 4-manifolds and hyperKahler geometry

Varun Thakre

摘要:

一个非线性推广的狄拉克算子在4维,通过取代旋量表示与超Kahler流形承认某些对称性,被认为是。我们发现,存在一个协变常数,广义旋量定义的基础4维流形上的Kahler结构。对于一类通过超Kahler约化得到的超Kahler流形,我们还证明了调和旋量,在温和的条件下,定义了一个辛结构。最后,我们证明了如果协变常数广义旋量满足广义Seiberg-Witten方程,则基流形上的度量具有常数数量曲率。

英文摘要:

A non-linear generalization of the Dirac operator in 4-dimensions, obtained by replacing the spinor representation with a hyperKahler manifold admitting certain symmetries, is considered. We show that the existence of a covariantly constant, generalized spinor defines a Kahler structure on the base 4-dimensional manifold. For a class of hyperKahler manifolds obtained via hyperKahler reduction, we also show that a harmonic spinor, under mild conditions, defines a symplectic structure. Finally, we show that if a covariantly constant, generalized spinor satisfies generalized Seiberg-Witten equations, the metric on the base manifold has a constant scalar curvature.

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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