International Journal of Nonlinear Analysis and Applications
An inverse triple effect domination in graphs
Document Type : Research Paper
Authors
Department of Mathematics, College of Education for Pure Sciences, University of Thi-Qar, Thi-Qar, Iraq
Abstract
In this paper, an inverse triple effect domination is introduced for any finite graph $G=(V, E)$ simple and undirected without isolated vertices. A subset $D^{-1}$ of $V-D$ is an inverse triple effect dominating set if every $v \in D^{-1}$ dominates exactly three vertices of $V-D^{-1}$. The inverse triple effect domination number $\gamma_{t e}^{-1}(G)$ is the minimum cardinality over all inverse triple effect dominating sets in $G$. Some results and properties on $\gamma_{t e}^{-1}(G)$ are given and proved. Under any conditions the graph satisfies $\gamma_{t e}(G)+\gamma_{t e}^{-1}(G)=n$ is studied. Lower and upper bounds for the size of a graph that has $\gamma_{t e}^{-1}(G)$ are putted in two cases when $D^{-1}=V-D$ and when $D^{-1} \neq V-D .$ Which properties of a vertex to be belongs to $D^{-1}$ or out of it are discussed. Then, $\gamma_{t e}^{-1}(G)$ is evaluated and proved for several graphs.
Keywords
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Volume 12, Issue 2
November 2021Pages 913-919
- Receive Date: 06 February 2021
- Revise Date: 26 March 2021
- Accept Date: 03 April 2021