期刊
THEORETICAL COMPUTER SCIENCE
卷 909, 期 -, 页码 12-18出版社
ELSEVIER
DOI: 10.1016/j.tcs.2022.01.024
关键词
Total coloring; Total chromatic number; Recursive maximal planar graph; (2,2)-recursive maximal planar graph; Total coloring algorithm
资金
- National Key R&D Program of China [2019YFA0706401]
- National Natural Science Foundation of China General Program [62172014, 62172015, 61872166]
- National Natural Science Foundation of China Youth Program [62002002]
This paper proves that the Total Coloring Conjecture holds for recursive maximal planar graphs, especially for a main class of recursive maximal planar graphs called (2,2)-recursive maximal planar graphs. Linear time algorithms for total coloring of recursive maximal planar graphs and (2,2)-recursive maximal planar graphs are also provided.
The recursive maximal planar graphs can be obtained from K-4, by embedding a 3-vertex in a triangular face continuously. A total k-coloring of a graph G is a coloring of its vertices and edges such that no two adjacent or incident elements receive the same color. The Total Coloring Conjecture, in short, TCC, states that every simple graph G is totally (Delta + 2)-colorable, where Delta is the maximum degree of G. In this paper, we prove that TCC holds for recursive maximal planar graphs, especially, a main class of recursive maximal planar graphs, named (2,2)-recursive maximal planar graphs, are totally (Delta + 1)-colorable. Moreover, we give linear time algorithms for total coloring of recursive maximal planar graphs and (2,2)-recursive maximal planar graphs, respectively. (C) 2022 Elsevier B.V. All rights reserved.
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