出典:Wikipedia
出典:『Wikipedia』 (2011/03/03 04:44 UTC 版)
In graph theory, the planarity testing problem asks whether, given a graph, that graph is a planar graph (can be drawn in the plane without edge intersections). This is a well-studied problem in computer science for which many practical algorithms have emerged, many taking advantage of novel data structures. Most of these methods operate in O(n) time (linear time), where n is the number of edges (or vertices) in the graph, which is asymptotically optimal.