Recognizing Hole-Free 4-Map Graphs in Cubic Time
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- Chen, Z., Grigni, M. & Papadimitriou, C. Algorithmica (2006) 45: 227. doi:10.1007/s00453-005-1184-8
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We present a cubic-time algorithm for the following problem: Given a simple graph, decide whether it is realized by adjacencies of countries in a map without holes, in which at most four countries meet at any point.