arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.13660math.MG
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内接于球面的五顶点最大表面积多面体$\mathbb{S}^2$

The Maximum Surface Area Polyhedron with Five Vertices Inscribed in the Sphere $\mathbb{S}^2$

Jessica Donahue, Steven Hoehner, Ben Li

摘要:

本文着重研究了解析地确定单位球面$\mathbb{S}^2$上五个点的最优位置,使这些点的凸包的表面积最大化的问题。结果表明,最优多面体具有三角双锥结构,其中两个顶点位于南极,其余三个顶点组成内接于赤道的等边三角形。这个结果证实了Akkiraju的一个猜想,他对最大化者进行了数值搜索。作为晶体学的一个应用,表面积的差异被认为是一个观察到的配位多面体和一个理想的扭曲之间的措施。主要结果给出了任意五顶点配位多面体的表面积差公式。

英文摘要:

This article focuses on the problem of analytically determining the optimal placement of five points on the unit sphere $\mathbb{S}^2$ so that the surface area of the convex hull of the points is maximized. It is shown that the optimal polyhedron has a trigonal bipyramidal structure with two vertices placed at the north and south poles and the other three vertices forming an equilateral triangle inscribed in the equator. This result confirms a conjecture of Akkiraju, who conducted a numerical search for the maximizer. As an application to crystallography, the surface area discrepancy is considered as a measure of distortion between an observed coordination polyhedron and an ideal one. The main result yields a formula for the surface area discrepancy of any coordination polyhedron with five vertices.

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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