In graph G = (V , E), a vertex set D β V is called a domination set if any vertex u β V \ D is connected to at least one vertex in D. Generally, for any natural number k, the k-tuple The k-tuple domination number is the minimum size of k-tuple domination sets. It is known that the 1-tuple dominatio
Proof of a conjecture on -tuple domination in graphs
β Scribed by Guangjun Xu; Liying Kang; Erfang Shan; Hong Yan
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 142 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0893-9659
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β¦ Synopsis
Let G = (V, E) be a graph and N G [v] the closed neighborhood of a vertex v in G. For k β N, the minimum cardinality of a set
In this note we prove the following conjecture of Rautenbach and Volkmann [D. Rautenbach, L. Volkmann, New bounds on the k-domination number and the k-tuple domination number, Appl. Math. Lett. 20 (2007)
π SIMILAR VOLUMES
## Abstract The game domination number of a (simple, undirected) graph is defined by the following game. Two players, \documentclass{article}\usepackage{amssymb}\usepackage{amsbsy}\usepackage[mathscr]{euscript}\footskip=0pc\pagestyle{empty}\begin{document}${\mathcal{A}}$\end{document} and \docume
A dominating set D of a graph G is a least dominating set (I.d.s) if y((D)) < 2~((D~)) for any dominating set D1 (7 denotes domination number). The least domination number ~ ~ (G) of G is the minimum cardinality of a 1.d.s. We prove a conjecture of Sampathkumar (1990) that Vl ~< 3p/5 for any connect
## Abstract Let __ir__(__G__) and Ξ³(__G__) be the irredundance number and the domination number of a graph __G__, respectively. A graph __G__ is called __irredundance perfect__ if __ir__(__H__)=Ξ³(__H__), for every induced subgraph __H__ of __G__. In this article we present a result which immediatel
It was conjectured in [Wang, to appear in The Australasian Journal of Combinatorics] that, for each integer k β₯ 2, there exists . This conjecture is also verified for k = 2, 3 in [Wang, to appear; Wang, manuscript]. In this article, we prove this conjecture to be true if n β₯ 3k, i.e., M (k) β€ 3k. W
## Abstract Mader conjectured that every __k__βcritical __n__βconnected noncomplete graph __G__ has __2k__β+β2 pairwise disjoint fragments. The author in 9 proved that the conjecture holds if the order of __G__ is greater than (__k__β+β2)__n__. Now we settle this conjecture completely. Β© 2004 Wiley