Δ(G)=5的2-连通外平面图的邻点可区别全染色

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  • 宁夏大学数学统计学院, 宁夏银川 750021
李春梅E-mail: 1053649493@qq.com

收稿日期: 2019-02-27

  网络出版日期: 2021-12-11

基金资助

国家自然科学基金(11261046);宁夏自然科学基金(2018AAC03055)

The Smrandachely adjacent vertex-distinguishing total coloring of 2-connected outer planar graphs with maximum degree 5

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  • School of Mathematics and Statistics, Ningxia University, Yinchuan 750021, Ningxia, China

Received date: 2019-02-27

  Online published: 2021-12-11

摘要

Smarandachely邻点可区别全染色是指相邻点的色集合互不包含的邻点可区别全染色,是对邻点可区别全染色条件的进一步加强。本文研究了平面图的Smarandachely邻点可区别全染色,即根据2-连通外平面图的结构特点,利用分析法、数学归纳法,刻画了最大度为5的2-连通外平面图的Smarandachely邻点可区别全色数。证明了:如果$G$是一个$\Delta (G)=5$的2-连通外平面图,则$\chi_{\rm sat}(G)\leqslant 9$

本文引用格式

李春梅, 王治文 . Δ(G)=5的2-连通外平面图的邻点可区别全染色[J]. 运筹学学报, 2021 , 25(4) : 120 -126 . DOI: 10.15960/j.cnki.issn.1007-6093.2021.04.011

Abstract

The adjacent vertex distinguishable total coloring is the total coloring with different sets of adjacent vertices, while the Smarandachely adjacent vertex distinguishing total coloring is the adjacent vertex distinguishing total coloring which does not contain each other in the color set of adjacent vertices. It is a further enhancement of the condition of adjacent vertex-distinguishing total coloring. We call the minimum number of colors used for a graph to satisfy Smarandachely's adjacent vertex-distinguishing total coloring as its Smarandachely adjacent vertex-distinguishing total chromatic number. In this paper, the Smarandachely adjacent vertex distinguishing total chromatic number of 2-connected outer plane graphs with maximum degree of 5 is studied by means of analytical method and mathematical induction. It is proved that if $G$ is a 2-connected outer planar graph with $\Delta(G)=5 $, then $\chi_{\rm sat}(G)\leqslant 9$.

参考文献

1 Bondy J A , Murty U S R . Graph Theory with Applications[M]. London: The Macmillan Press Ltd, 1976.
2 Zhang Z F , Zhang J X , Wang J F . The total chromatic number of some graphs[J]. Science in China (Series A), 1998, 18 (2): 1434- 1441.
3 张忠辅, 陈祥恩, 李敬文, 等. 关于图的邻点可区别全染色[J]. 中国科学A辑: 数学, 2004, 34 (5): 574- 583.
4 王维凡, 王平. 没有$K_{4}$-图子式的图的邻点可区别全染色[J]. 中国科学A辑: 数学, 2009, 39 (12): 1462- 1472.
5 黄丹君, 王维凡. 高度平面图的邻点可区别全染色[J]. 中国科学: 数学, 2012, 42 (2): 151- 164.
6 Zhang Z F, Xu W H, Liu G D, et al. The Smarandachely adjacent vertex total coloring of graphs[EB/OL]. (2009-05-06)[2019-02-06]. http://202.201.18.40:8080/mas5/.
7 田京京. 几类Mycielske图的Smarandchely邻点可区别染色[J]. 数学杂志, 2012, 32 (4): 723- 728.
8 Chen X E , Zhang Z F . Adjacent-vertex-distinguishing total chromatic numbers on 2-connected outer plane graph with $\Delta (G)\leq 4$[J]. Journal of Lanzhou University (Natural Sciences), 2006, 42 (6): 96- 102.
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