摘要
目前对积图交叉数的研究已经推广到6阶图与星图.计算并证明了6阶图{P26+e}与星Sn的积图交叉数cr({P26+e}×Sn)=Z(6,n)+4n.
Research on the cossing number of product graph has been spread to 6-order graph and star graph. In this paper,the authors obtain the crossing numbers of Cartesian products of the 6-vertex graph {P6^2+e} with the stars Sn is Z(6,n)+4n.
出处
《吉首大学学报(自然科学版)》
CAS
2012年第4期20-24,共5页
Journal of Jishou University(Natural Sciences Edition)
基金
湖南省教育厅一般资助项目(11C0981)
关键词
笛卡尔积图
交叉数
星图
6阶图
Cartesian products
crossing number
stars
6-vertex graph