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Structural properties of bichromatic non-crossing matchings
Applied Mathematics and Computation ( IF 4 ) Pub Date : 2021-10-10 , DOI: 10.1016/j.amc.2021.126695
Marko Savić 1 , Miloš Stojaković 1
Affiliation  

Given a set of n red and n blue points in the plane, we are interested in matching red points with blue points by straight line segments so that the segments do not cross. We develop a range of tools for dealing with the non-crossing matchings of points in convex position. It turns out that the points naturally partition into groups that we refer to as orbits, with a number of properties that prove useful for studying and efficiently processing the non-crossing matchings.

Bottleneck matching is a matching that minimizes the length of the longest segment. Illustrating the use of the developed tools, we solve the problem of finding bottleneck matchings of points in convex position in O(n2) time. Subsequently, combining our tools with a geometric analysis we design an O(n)-time algorithm for the case where the given points lie on a circle. The best previously known running times were O(n3) for points in convex position, and O(nlogn) for points on a circle.



中文翻译:

双色非交叉匹配的结构特性

给定一组 n 红色和 n平面中的蓝点,我们感兴趣的是通过直线段将红点与蓝点匹配,使线段不交叉。我们开发了一系列工具来处理凸位置点的非交叉匹配。事实证明,这些点自然地划分为我们称为轨道的组,具有许多被证明对研究和有效处理非交叉匹配有用的特性。

瓶颈匹配是将最长段的长度最小化的匹配。说明了开发工具的使用,我们解决了在凸位置找到点的瓶颈匹配的问题(n2)时间。随后,将我们的工具与几何分析相结合,我们设计了一个(n)-给定点位于圆上的情况下的时间算法。以前已知的最佳运行时间是(n3) 对于凸位置的点,和 (n日志n) 表示圆上的点。

更新日期:2021-10-12
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