摘要
改进了Riddle的尾点法,得到自然数k属于二部图匹配强迫数谱的必要条件,给出了二部图的最小强迫数等于一个颜色集所有规范序最小尾点数的充要条件。
The trailing-vertex method in essence is improved,a necessary condition for the forcing number of perfect matching equals to a given natural number k for a bipartite graph is obtained,and a necessary and sufficient condition for the minimum forcing number equals the minimum number of trailing vertices of all standard orderings of a color set is given.
出处
《山东大学学报(理学版)》
CAS
CSCD
北大核心
2009年第12期30-35,40,共7页
Journal of Shandong University(Natural Science)
基金
临沂师范学院博士科研启动基金资助项目(BS08027)