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Every Schnyder drawing is a greedy embedding
Theoretical Computer Science ( IF 1.1 ) Pub Date : 2019-07-19 , DOI: 10.1016/j.tcs.2019.07.021
Pierre Leone , Kasun Samarasinghe , José D.P. Rolim

In this paper, we show that every Schnyder drawing is a greedy embedding. Schnyder drawings are used to represent planar (maximal) graphs. It is a way of getting coordinates in R2 given a graph G=(V,E) such that the representation is planar. The Schnyder technique leads to a family of representations and previous results show that a particular representation may be chosen such that the drawing has additional properties like being greedy or monotone. In this article, we relax the definition of greediness to a definition that does not rely on the geometry and the Euclidean distance in R2, but rather on the combinatorial graph G. The construction of greedy paths valid for all Schnyder representations shows that, provided the relaxed definition, every Schnyder drawing is a greedy embedding.



中文翻译:

每个Schnyder绘图都是贪婪的嵌入

在本文中,我们表明每个Schnyder绘图都是贪婪的嵌入。施耐德(Schnyder)图用于表示平面(最大)图。这是获取坐标的一种方法[R2 给定一个图 G=VË这样表示是平面的。施耐德技术导致了一系列的表示,先前的结果表明可以选择一个特定的表示,使得绘图具有诸如贪婪单调之类的其他性质。在本文中,我们将贪婪的定义放宽为一个不依赖于几何形状和欧氏距离的定义。[R2,而是在组合图G上。对所有Schnyder表示形式均有效的贪婪路径构造表明,只要提供宽松的定义,每个Schnyder绘图都是贪婪的嵌入。

更新日期:2019-07-19
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