Labeling Embeddings of Planar Graphs for Face-Adjacency
摘要
We design a \(O(\log n)\) labeling scheme for planar graph embeddings. Given the labels of any two vertices we can directly determine whether the two vertices share a face. In the scheme, we use and design a \(O(\log n)\) labeling scheme for the property of two vertices sharing a common neighbor in a planar graph, a problem which we show to be equivalent to labeling for face-adjacency. We also prove a lower bound of \((1 + o(1))\log _2 n\) on label length.