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最大度是6的平面图是第一类图的一个充分条件

A Sufficient Conditions for a Planar Graph of Maximum Degree Six to be Class 1
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摘要 对于最大度是Δ的可平面图G,如果χ'(G)=Δ,称G为第一类图;如果χ'(G)=Δ+1,称G为第二类图,χ'(G)表示G的边色数.文章运用Discharge方法证明:最大度是6且任意一个3-圈与任意一个5-圈不相邻接的简单平面图是第一类图. Let G be a planar graph of maximum degree A, G is said to be class 1 if χ'(G)=Δ and class 2 ifχ'(G)=Δ+1, where X' (G) denotes the chromatic index of G. By applying a discharging method, we proved that every simple planar graph G with A = 6 is of class 1, if G contains no any 3 - cycle adjacent to any 5 - cycle.
作者 杨星星 宋杨
出处 《淮北师范大学学报(自然科学版)》 CAS 2012年第3期18-23,共6页 Journal of Huaibei Normal University:Natural Sciences
基金 宿州学院一般科学研究项目(2011yyb01)
关键词 平面图 边染色 最大度 planar graph edge coloring maximum degree cycle
  • 相关文献

参考文献8

  • 1VIZING V G. On an estimate of the chromatic index of a p-graph[J].Diskret Analiz,1964,(01):25-30.
  • 2VIZING V G. Critical graphs with given chromatic class[J].Diskret Analiz,1965,(05):9-17.
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  • 8杨星星,苗连英,宁群.最大度是6的平面图是第一类图的一个充分条件[J].徐州师范大学学报(自然科学版),2011,29(2):17-21. 被引量:1

二级参考文献7

  • 1Vizing V G. On an estimate of the chromatic index of a p-graph [J]. Diskret Analiz,1964,3(1) :25.
  • 2Vizing V G. Critical graphs with given chromatic class [J]. Diskret Analiz, 1965,5(1) : 9.
  • 3Zhang Liming. Every planar graph with tnaximum de- gree 7 is of class 1[J]. Graphs Combin, 2000, 16 (4) :467.
  • 4Sanders D P,Zhao Yue. Planar graphs of maximum de- gree seven are class l[J]. J Combin Theo..Ser B,2001, 83(2) :201.
  • 5Zhou Guofei. A note on graphs of class l[J]. Discrete Math,2003,262(1/2/3):339.
  • 6Bu Yuehua, Wang Weifan. Some sufficient conditions for a planar graph of maximum degree six to be class 1 [J]. Discrete Math, 2006,306 (13) :1440.
  • 7Li Xuechao, Luo Rong. Edge coloring of embedded graphs with large girth[J]. Graphs Combin, 2003,19 (3) :393.

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