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arXiv 2103.00076cs.CGcs.DS
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简单多边形测地线最远点沃罗诺伊图的最优确定算法

An Optimal Deterministic Algorithm for Geodesic Farthest-Point Voronoi Diagrams in Simple Polygons

Haitao Wang

摘要:

给定$n$顶点的简单多边形$P$中的$m$点集$S$,考虑$P$中$S$的测地线最远点Voronoi图的计算问题.已知该问题具有$Ω(n+m\log m)$时间下限。之前,提出了一种随机算法[Barba,SoCG 2019],可以在$O(n+m\log m)$预期时间内解决该问题。之前的最佳确定性算法在$O(n\log \log n+ m\log m)$时间[Oh,Barba,and Ahn,SoCG 2016]或在$O(n+m\log m+m\log^2 n)$时间[Oh and Ahn,SoCG 2017]中解决了该问题。本文提出了一种确定性的$O(n+m\log m)$时间算法,它是最优的.这就回答了二十年前米切尔在《计算几何手册》中提出的一个悬而未决的问题。

英文摘要:

Given a set $S$ of $m$ point sites in a simple polygon $P$ of $n$ vertices, we consider the problem of computing the geodesic farthest-point Voronoi diagram for $S$ in $P$. It is known that the problem has an $Ω(n+m\log m)$ time lower bound. Previously, a randomized algorithm was proposed [Barba, SoCG 2019] that can solve the problem in $O(n+m\log m)$ expected time. The previous best deterministic algorithms solve the problem in $O(n\log \log n+ m\log m)$ time [Oh, Barba, and Ahn, SoCG 2016] or in $O(n+m\log m+m\log^2 n)$ time [Oh and Ahn, SoCG 2017]. In this paper, we present a deterministic algorithm of $O(n+m\log m)$ time, which is optimal. This answers an open question posed by Mitchell in the Handbook of Computational Geometry two decades ago.

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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