厦门理工学院应用数学学院
纸质出版:2021
移动端阅览
[1]庄蔚.关于树图中全控制数与全外部连通控制数比值的研究[J].新疆大学学报(自然科学版)(中英文),2021,38(03):269-274.
[1]庄蔚.关于树图中全控制数与全外部连通控制数比值的研究[J].新疆大学学报(自然科学版)(中英文),2021,38(03):269-274. DOI: 10.13568/j.cnki.651094.651316.2020.05.26.0005.
DOI:10.13568/j.cnki.651094.651316.2020.05.26.0005.
1980年Cockayne等人提出全控制数γt(G)
目前已成为最重要的控制参数之一.近些年
一种与全控制数密切相关的控制参数被广泛研究
即:全外部连通控制数γtc(G).众所周知
γt(G)≤γtc(G).在本文中
我们证明了若T没有强支撑点
则γtc(T)≤5γt(T)/2-2.同时
我们也刻画出了达到这个不等式上界的极图.
Total domination number γt(G)
is one of the most important domination parameters
which was introduced by Cockayne et al. in 1980. In recent years
a variant of total domination number have been extensively studied
namely
total outer connected domination number γtc(G). It is well known that γt(G) ≤ γtc(G). In this paper
we show that if T has no strong support vertex
we have that γtc(T) ≤5γt(T)/2-2. In addition
we provide a constructive characterizations of the trees achieving equality in the bound.
HENNING M A.A survey of selected recent results on total domination in graphs[J].Discrete Mathematics,2009,309:32-63.
CYMAN J.Total outer-connected domination in trees[J].Discussiones Mathematicae Graph Theory,2010,30:377-383.
SHAN E F,KANG L,HENNING M A.A characterization of trees with equal total domination and paired-domination numbers[J].Australasian Journal of Combinatorics,2004,30:31-39.
FAVARON O,KARAMI H,SHEKHOLESLAMI S M.On the total outer-connected domination in graphs[J].Journal of Combinatorial Optimization,2014,27:451-461.
CYMAN J,RACZEK J.Total outer-connected domination numb ers of trees[J].Discrete Applied Mathematics,2009,157:3198-3202.
DORFLING M,GODDARD W,HENNING M A,et al.Construction of trees and graphs with equal domination parameters[J].Discrete Mathematics,2006,306:2647-2654.
0
浏览量
48
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621
