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 given a graph 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 , 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 给定一个图 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或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。,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。