两类特殊图的控制数

2021-01-16 02:53岳孟田李文升李增提李瑞娟

岳孟田 李文升 李增提 李瑞娟

【摘要】设G=(V,E)是一个无向图,图G的控制数λ(G)为图G的所有控制函数的最小权重。研究蜘蛛图S2,n、S3,n及联圈图2·Cm的控制问题,得到了S2,n、S3,n的控制数的确切值,分别为n和n+1,同时证明了联圈图2·Cm的控制数满足当m0(mod 3)时,γ(2·Cm)=(2m-3)/3;当m1(mod 3)时,γ(2·Cm)=(2m+1)/3;当m2(mod3)时,γ(2·Cm)=(2m-1)/3。

【关键词】控制函数;控制数;蜘蛛图;联圈图

〔中图分类号〕O157.5 〔文献标识码〕A 〔文章编号〕1674-3229(2021)04-0012-03

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[收稿日期]2021-10-20

[基金項目]河北省教育厅重点项目(ZD2018074)

[作者简介]岳孟田(1973-),男,硕士,廊坊师范学院理学院教授,研究方向:应用数学。