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arXiv 2103.13849math.DG
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de Sitter空间中类空中曲率曲面的奇性

Singularities of spacelike mean curvature one surfaces in de Sitter space

Atsufumi Honda, Himemi Sato

摘要:

本文研究了deSitter三维空间中类空常中曲率1(CMC 1)曲面的奇性.证明了类空CMC 1曲面上广义锥状奇点与5/2尖点边的对偶性。为了描述$A_{k+3}$奇异性和尖点$S_k$奇异性之间的对偶性,我们引入了类空CMC 1曲面在其奇点处的两个不变量,称为$α$ -不变量和$σ$ -不变量.此外,我们还给出了类空CMC 1曲面上非退化奇点的分类。

英文摘要:

In this paper, we study the singularities of spacelike constant mean curvature one (CMC 1) surfaces in the de Sitter 3-space. We prove the duality between generalized conelike singular points and 5/2-cuspidal edges on spacelike CMC 1 surfaces. To describe the duality between $A_{k+3}$ singularities and cuspidal $S_k$ singularities, we introduce two invariants, called the $α$-invariant and $σ$-invariant, of spacelike CMC 1 surfaces at their singular points. Moreover, we give a classification of non-degenerate singular points on spacelike CMC 1 surfaces.

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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