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arXiv 1802.09699math.DGmath.AG
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一个叶状的希钦-小林对应

A foliated Hitchin-Kobayashi correspondence

David Baraglia, Pedram Hekmati

摘要:

我们证明了一个类似的Hitchin-Kobayashi对应紧,定向,拉紧黎曼叶流形的横向厄米结构。特别地,我们的Hitchin-Kobayashi定理在任何紧的Sasakian流形上都成立。本文定义了具有横截全纯结构的叶化厄米向量丛的稳定性概念,证明了这类丛存在基本厄米-爱因斯坦联络的充要条件是它们是多稳定的.我们的证明是通过适应证明乌伦贝克和丘的叶状设置。我们与横向厄米-爱因斯坦方程高维瞬子方程,特别是我们期待在Sasaki流形上的关系,以更高的接触瞬子。对于复余维为1的叶理,我们得到了横截Narasimhan-Seshadri定理。我们还证明了弱乌伦贝克紧性定理失败,在一般的基本连接上的叶状丛。这表明,规范理论中并非所有的结果都适用于片理化背景。

英文摘要:

We prove an analogue of the Hitchin-Kobayashi correspondence for compact, oriented, taut Riemannian foliated manifolds with transverse Hermitian structure. In particular, our Hitchin-Kobayashi theorem holds on any compact Sasakian manifold. We define the notion of stability for foliated Hermitian vector bundles with transverse holomorphic structure and prove that such bundles admit a basic Hermitian-Einstein connection if and only if they are polystable. Our proof is obtained by adapting the proof by Uhlenbeck and Yau to the foliated setting. We relate the transverse Hermitian-Einstein equations to higher dimensional instanton equations and in particular we look at the relation to higher contact instantons on Sasaki manifolds. For foliations of complex codimension 1, we obtain a transverse Narasimhan-Seshadri theorem. We also demonstrate that the weak Uhlenbeck compactness theorem fails in general for basic connections on a foliated bundle. This shows that not every result in gauge theory carries over to the foliated setting.

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