摘要
研究了平面图的线性着色.对平面图G,证明了lc(G)≤min{2Δ(G)+3,Δ(G)+15}和lc(G)≤max{└0.9Δ(G)┘+4,┌Δ(G)/2┐+22},改进了平面图线性着色色数的上界.
The linear coloring of planar graphs is studied in this paper. For a planar graph G, it is proved thatlc(G)≤min{2△(G)+3, △(G)+15} andlc(G)≤max{ └0.9A(G) ┘ +4,└△(G)/2┘ +22}, thus improving the upper bounds on the linear chromatic number of planar graphs.
出处
《西南大学学报(自然科学版)》
CAS
CSCD
北大核心
2013年第2期99-102,共4页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科委自然科学基金计划资助项目(CSTC
2007BB2123)
关键词
平面图
线性着色
线性色数
最大度
planar graph
linear coloring
linear chromatic number
maximum degree