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Domination Number, Independent Domination Number and 2-Independence Number in Trees

open access: yesDiscussiones Mathematicae Graph Theory, 2021
For a graph G, let γ(G) be the domination number, i(G) be the independent domination number and β2(G) be the 2-independence number. In this paper, we prove that for any tree T of order n ≥ 2, 4β2(T) − 3γ(T) ≥ 3i(T), and we characterize all trees ...
Dehgardi Nasrin   +4 more
doaj   +2 more sources

Maker-Breaker domination number [PDF]

open access: yesBulletin of the Malaysian Mathematical Sciences Society, 2019
The Maker-Breaker domination game is played on a graph $G$ by Dominator and Staller. The players alternatively select a vertex of $G$ that was not yet chosen in the course of the game.
Gledel, Valentin   +2 more
core   +4 more sources

Graphs with equal domination and independent domination numbers [PDF]

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
Let γ(G) and i(G) denote the domination number and independent domination number of a graph G. In this article, we establish a sufficient condition for a graph G to satisfy which yields some of the well known classical theorems as corollaries.
Purnima Gupta, Rajesh Singh, S. Arumugam
doaj   +2 more sources

Independent [1,2]-number versus independent domination number [PDF]

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
A [1; 2]-set S in a graph G is a vertex subset such that every vertex not in S has at least one and at most two neighbors in it. If the additional requirement that the set be independent is added, the existence of such sets is not guaranteed in every ...
Aleid Sahar A.   +2 more
doaj   +3 more sources

On the equality of domination number and 2-domination number

open access: yesDiscussiones Mathematicae Graph Theory
The 2-domination number $ _2(G)$ of a graph $G$ is the minimum cardinality of a set $ D \subseteq V(G) $ for which every vertex outside $ D $ is adjacent to at least two vertices in $ D $. Clearly, $ _2(G) $ cannot be smaller than the domination number $ (G) $. We consider a large class of graphs and characterize those members which satisfy $ _2=
Gülnaz Boruzanlı Ekinci   +1 more
doaj   +4 more sources

Bounds on the Locating-Domination Number and Differentiating-Total Domination Number in Trees

open access: yesDiscussiones Mathematicae Graph Theory, 2018
A subset S of vertices in a graph G = (V,E) is a dominating set of G if every vertex in V − S has a neighbor in S, and is a total dominating set if every vertex in V has a neighbor in S.
Rad Nader Jafari, Rahbani Hadi
doaj   +2 more sources

The Domination Number of K3n

open access: yesDiscussiones Mathematicae Graph Theory, 2014
Let K3n denote the Cartesian product Kn□Kn□Kn, where Kn is the complete graph on n vertices.
Georges John, Lin Jianwei, Mauro David
doaj   +3 more sources

The Domination Parameters on a kind of the regular honeycomb structure [PDF]

open access: yesComputer Science Journal of Moldova, 2022
The honeycomb mesh, based on hexagonal structure, has enormous applications in chemistry and engineering. A major challenge in this field is to understand the unique properties of honeycomb structures, which depend on their properties of topology. One
Fateme Movahedi   +2 more
doaj   +1 more source

Medium Domination Decomposition of Graphs

open access: yesRatio Mathematica, 2022
A set of vertices  in a graph  dominates  if every vertex in  is either in  or adjacent to a vertex in . The size of any smallest dominating set is called domination number of .
E Ebin Raja Merly, Saranya J
doaj   +1 more source

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