Total domination number of the conjunction of graphs

被引:5
|
作者
Zwierzchowski, Maciej [1 ]
机构
[1] Tech Univ Szczecin, Inst Math, PL-70310 Szczecin, Poland
关键词
total domination number; conjunction of graphs;
D O I
10.1016/j.disc.2005.11.047
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
In this paper we discuss the total domination number with respect to the conjunction of two graphs. We estimate the total domination number of the conjunction G boolean AND H, showing that gamma(t) (G boolean AND H) <= gamma t (G)gamma t (H), for graphs having no isolated vertices. Additionally, we show that for G congruent to Pu or for G and H having the domination number equal to half their orders, the equality is attained. (c) 2006 Published by Elsevier B.V.
引用
收藏
页码:1016 / 1020
页数:5
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