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arXiv 2109.02745math.DGmath.CV
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极小图的零曲率点

Zero-curvature point of minimal graphs

David Kalaj

摘要:

受Finn和Osserman(1964)的一个经典结果的启发,他们证明了单位圆内接正方形上的Scherk曲面对于点$O$的高斯曲率是极值的(所谓的\emph{centre})的最小图以上的中心$0$单位圆盘,假设切面是水平的,我们提出并回答了这样的图的高斯曲率的“二阶导数”的极值问题,只要它在$O$处的曲率为零。证明了当高斯曲率为零且切面在中心处水平时,这些极值是内接于单位圆盘的正六边形上的某些Scherk型极小曲面.

英文摘要:

Motivated by a classical result of Finn and Osserman (1964), who proved that the Scherk surface over the square inscribed in the unit disk is extremal for the Gaussian curvature of the point $O$ (so-called \emph{centre}) of the minimal graphs above the center $0$ of unit unit disk, provided the tangent plane is horizontal, we ask and answer to the question concerned the extremal of "second derivative" of the Gaussian curvature of such graphs provided that its curvature at $O$ is zero. We prove that the extremals are certain Scherk type minimal surfaces over the regular hexagon inscribed in the unit disk, provided that the Gaussian curvature vanishes and the tangent plane is horizontal at the centre.

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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