Planar map graphs

Planar map graphs
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平面地图

DOI:
10.1145/276698.276865
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发表时间:
1998
期刊:
J. Algorithms
影响因子:
--
通讯作者:
C. Papadimitriou
C. Papadimitriou
中科院分区:
--
文献类型:
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作者:
Zhi;Michelangelo Grigni;C. Papadimitriou

文献摘要

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我们介绍和研究一个modi艾德ed平面性的概念,其中两个区域的地图被认为是相邻的,当他们共享任何点的边界(而不是一个边缘,作为标准的平面性要求)。我们试图描述的抽象图实现这样的地图邻接。我们证明了这类图的一些初步性质,并给出了以下限制性问题的多项式时间算法:给定一个抽象图,决定它是否由一个至多四个区域在任何点相交的映射实现。普遍承认问题仍然悬而未决。
We introduce and study a modi ed notion of planarity, in which two regions of a map are considered adjacent when they share any point of their boundaries (not an edge, as standard planarity requires). We seek to characterize the abstract graphs realized by such map adjacencies. We prove some preliminary properties of such graphs, and give a polynomial time algorithm for the following restricted problem: given an abstract graph, decide whether it is realized by a map in which at most four regions meet at any point. The general recognition problem remains open.