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arXiv 1604.02936math.DG
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广义拉格朗日中曲率流:余切丛情形

Generalized Lagrangian mean curvature flows: the cotangent bundle case

Knut Smoczyk, Mao-Pei Tsui, Mu-Tao Wang

摘要:

在[SW 2]中,我们定义了几乎Kähler流形上任意拉格朗日子流形上关于挠联络的广义中曲率向量场.建立了相应抛物流的短时存在性。此外,它表明,流保持拉格朗日条件,只要连接满足爱因斯坦条件。本文证明了任何黎曼流形的余切丛上的正则联络都是Einstein联络(实际上是Ricci平坦的)。任何拉格朗日子流形上的广义中曲率向量与由平行(n,0)形式的相位定义的拉格朗日角有关,就像卡-丘情形一样。我们还证明了余切丛中相应的拉格朗日中曲率流保持了精确性和零Maslov类条件。最后,我们证明了余切球丛零截面的长时间存在性和收敛性,从而证明了余切球丛零截面的稳定性。

英文摘要:

In [SW2], we defined a generalized mean curvature vector field on any almost Lagrangian submanifold with respect to a torsion connection on an almost Kähler manifold. The short time existence of the corresponding parabolic flow was established. In addition, it was shown that the flow preserves the Lagrangian condition as long as the connection satisfies an Einstein condition. In this article, we show that the canonical connection on the cotangent bundle of any Riemannian manifold is an Einstein connection (in fact, Ricci flat). The generalized mean curvature vector on any Lagrangian submanifold is related to the Lagrangian angle defined by the phase of a parallel (n, 0) form, just like the Calabi-Yau case. We also show that the corresponding Lagrangian mean curvature flow in cotangent bundles preserves the exactness and the zero Maslov class conditions. At the end, we prove a long time existence and convergence result to demonstrate the stability of the zero section of the cotangent bundle of spheres.

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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