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arXiv 1802.09694math.DG
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关于带边界的$G_{2}$ -流形的注记

Remarks on $G_{2}$-manifolds with boundary

Simon Donaldson

摘要:

本文基于2017年哈佛大学微分几何会议期刊上的演讲。本文讨论了有边界的7-流形上的闭无挠$G_{2}$ -结构,在边界上具有指定的$3$ -形式.这篇文章的大部分内容是基于这样一个观察,即对于这种边界数据,存在一个内在的“平均凸性”概念。当边界数据是平均凸时,可以应用黎曼几何的经典参数。另一个主题是与极大子流形方程的连接,在空间的不定签名。

英文摘要:

This article is based on a lecture at the Journal of Differential Geometry Conference, Harvard 2017. We discuss closed and torsion-free $G_{2}$-structures on a 7-manifold with boundary, with prescribed $3$-form on the boundary. Much of the article is based on an observation that there is an intrinsic notion of "mean convexity" for such boundary data. When the boundary data is mean convex, classical arguments from Riemannian geometry can be applied. Another theme is a connection with the maximal submanifold equation, in spaces of indefinite signature.

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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