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arXiv 1002.4364cs.CG
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关于高阶德洛内三角剖分的个数

On the Number of Higher Order Delaunay Triangulations

Dieter Mitsche, Maria Saumell, Rodrigo I. Silveira

摘要:

高阶德洛内三角剖分是Delaunay三角剖分的推广,它提供了一类良好的三角剖分,可以优化额外的标准。如果三角剖分的每个三角形的外接圆最多包含$k$点,则三角剖分是序- $k$ Delaunay。本文研究了随机分布点的高阶德洛内三角剖分个数的上、下界及其期望个数。我们发现,任意大的点集可以有一个更高的阶Delaunay三角剖分,即使是大订单,而一阶德洛内三角剖分,最大数量是$2^{n-3}$。接下来,我们表明,均匀分布的点有一个预期数量的至少$2^{ρ_1 n(1+o(1))}$一阶德洛内三角剖分,其中$ρ_1$是一个解析定义的常数($ρ_1 \approx 0.525785$),并为$k > 1$,预期数量的顺序$k$德洛内三角剖分(这不是顺序$i$任何$i < k$)是至少$2^{ρ_k n(1+o(1))}$,其中$ρ_k$可以计算数值。

英文摘要:

Higher order Delaunay triangulations are a generalization of the Delaunay triangulation which provides a class of well-shaped triangulations, over which extra criteria can be optimized. A triangulation is order-$k$ Delaunay if the circumcircle of each triangle of the triangulation contains at most $k$ points. In this paper we study lower and upper bounds on the number of higher order Delaunay triangulations, as well as their expected number for randomly distributed points. We show that arbitrarily large point sets can have a single higher order Delaunay triangulation, even for large orders, whereas for first order Delaunay triangulations, the maximum number is $2^{n-3}$. Next we show that uniformly distributed points have an expected number of at least $2^{ρ_1 n(1+o(1))}$ first order Delaunay triangulations, where $ρ_1$ is an analytically defined constant ($ρ_1 \approx 0.525785$), and for $k > 1$, the expected number of order-$k$ Delaunay triangulations (which are not order-$i$ for any $i < k$) is at least $2^{ρ_k n(1+o(1))}$, where $ρ_k$ can be calculated numerically.

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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