Results 31 to 40 of about 14,233,339 (289)

The Forcing Domination Number of Hamiltonian Cubic Graphs [PDF]

open access: yes, 2009
The authors presented a sequence of Hamiltonian cubic graphs whose domination numbers are sharp and in this paper we study forcing domination number for those ...
H. Abdollahzadeh Ahangar   +3 more
core   +1 more source

Properties of the Global Total k-Domination Number

open access: yesMathematics, 2021
A nonempty subset D⊂V of vertices of a graph G=(V,E) is a dominating set if every vertex of this graph is adjacent to at least one vertex from this set except the vertices which belong to this set itself.
Frank A. Hernández Mira   +3 more
doaj   +1 more source

On Roman, Global and Restrained Domination in Graphs [PDF]

open access: yes, 2010
In this paper, we present new upper bounds for the global domination and Roman domination numbers and also prove that these results are asymptotically best possible.
Zverovich, Vadim   +3 more
core   +1 more source

A note on bipartite graphs whose [1,k]-domination number equal to their number of vertices [PDF]

open access: yesOpuscula Mathematica, 2020
A subset \(D\) of the vertex set \(V\) of a graph \(G\) is called an \([1,k]\)-dominating set if every vertex from \(V-D\) is adjacent to at least one vertex and at most \(k\) vertices of \(D\).
Narges Ghareghani   +2 more
doaj   +1 more source

Trees with equal total domination and game total domination numbers

open access: yesDiscrete Applied Mathematics, 2017
In this paper, we continue the study of the total domination game in graphs introduced in [Graphs Combin. 31(5) (2015), 1453--1462], where the players Dominator and Staller alternately select vertices of $G$. Each vertex chosen must strictly increase the number of vertices totally dominated, where a vertex totally dominates another vertex if they are ...
Michael A. Henning, Douglas F. Rall
openaire   +4 more sources

Perfect Domination Excellent Trees [PDF]

open access: yes, 2012
A set D of vertices of a graph G is a perfect dominating set if every vertex in V \ D is adjacent to exactly one vertex in D. In this paper we introduce the concept of perfect domination excellent graph as a graph in which every vertex belongs to some ...
Sharada, B., Sharada B.
core   +1 more source

Inequalities involving independence domination, $f$-domination, connected and total $f$-domination numbers [PDF]

open access: yes, 1978
summary:Let $f$ be an integer-valued function defined on the vertex set $V(G)$ of a graph $G$. A subset $D$ of $V(G)$ is an $f$-dominating set if each vertex $x$ outside $D$ is adjacent to at least $f(x)$ vertices in $D$.
Allan, Robert B.   +7 more
core   +1 more source

On a conjecture concerning total domination subdivision number in graphs

open access: yesAKCE International Journal of Graphs and Combinatorics, 2021
Let be the total domination number and let be the total domination subdivision number of a graph G with no isolated vertex. In this paper, we show that for some classes of graphs G, which partially solve the conjecture presented by Favaron et al.
S. Kosari   +5 more
doaj   +1 more source

The Number of Minimum Dominating Sets in Pn × P2 [PDF]

open access: yes, 2010
A set S of vertices in a graph G is said to be a Smarandachely k-dominating set if each vertex of G is dominated by at least k vertices of S.
Kishori P. Narayankar   +5 more
core   +1 more source

Hop Domination in Graphs-II

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
Let G = (V;E) be a graph. A set S ⊂ V (G) is a hop dominating set of G if for every v ∈ V - S, there exists u ∈ S such that d(u; v) = 2. The minimum cardinality of a hop dominating set of G is called a hop domination number of G and is denoted by γh(G ...
Natarajan C., Ayyaswamy S.K.
doaj   +1 more source

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