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图有分数因子的联结数和最小度条件
Binding number and minimum degree conditions for graphs to have fractional factors
【摘要】 研究了图有分数因子的联结数和最小度条件.给出了一个图有分数1-因子的与联结数有关的充分必要条件。当k≥2时,给出了一个图有分数k-因子的两个充分条件,并证明了所得结果是最好可能的.
【Abstract】 Binding number and minimum degree conditions for a graph to have fractional factors are studied. Firstly, a necessary and sufficient condition on binding number for a graph to have a fractional 1-factor is given. Secondly, two sufficient conditions for a graph to have a fractional A-factor with k≥2 are obtained and it is shown that the results are best possible.
【关键词】 图;
联结数;
分数1-因子;
分数k-因子;
【Key words】 graph; binding number; fractional 1-factor; fractional k-factor;
【Key words】 graph; binding number; fractional 1-factor; fractional k-factor;
【基金】 国家自然科学基金资助项目(60172003);山东省自然科学基金资助项目(Z2000A02)
- 【文献出处】 山东大学学报(理学版) ,Journal of Shandong University(Natural Science) , 编辑部邮箱 ,2004年03期
- 【分类号】O157.5
- 【被引频次】7
- 【下载频次】55