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arXiv 1707.07396math.DG
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三维Lorentz-Minkowski空间中的类光点曲面及其应用

Surfaces with light-like points in Lorentz-Minkowski 3-space with applications

Masaaki Umehara, Kotaro Yamada

摘要:

本文利用偏微分方程Cauchy-Kovalevski定理构造了零平均曲率曲面的所有实解析芽,并给出了$\boldsymbol{R}^3_1$中含有类光线的零平均曲率曲面的几个具体例子.曲面的第一基本型退化的点称为类光点。本文还证明了$\boldsymbol{R}^3_1$中的曲面的类光点的一个性质定理,该曲面的中曲率向量是光滑可扩的。这就解释了为什么这样的表面在不改变因果类型时会包含一条类似光线的线。最后给出了这两个结果的几个应用。

英文摘要:

With several concrete examples of zero mean curvature surfaces in $\boldsymbol{R}^3_1$ containing a light-like line recently having been found, here we construct all real analytic germs of zero mean curvature surfaces by applying the Cauchy-Kovalevski theorem for partial differential equations. A point where the first fundamental form of a surface degenerates is said to be light-like. We also show a theorem on a property of light-like points of a surface in $\boldsymbol{R}^3_1$ whose mean curvature vector is smoothly extendable. This explains why such surfaces will contain a light-like line when they do not change causal types. Moreover, several applications of these two results are given.

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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