International Journal of Nonlinear Analysis and Applications

Stability of (1,2)-total pitchfork domination

Articles in Press

Document Type : Research Paper

Authors

Department of Mathematics, College of Education for Pure Sciences, University of Thi-Qar, Thi-Qar, Iraq

10.22075/ijnaa.2021.23235.2503

Abstract

Let $G=(V, E)$ be a finite, simple, and undirected graph without an isolated vertex. We define a dominating  $D$ of $V(G)$ as a total pitchfork dominating set if $1\leq|N(t)\cap V-D|\leq2$ for every $t \in D$ such that $G[D]$ has no isolated vertex. In this paper, the effects of adding or removing an edge and removing a vertex from a graph are studied on the order of minimum total pitchfork dominating set $\gamma_{pf}^{t} (G)$ and the order of minimum inverse total pitchfork dominating set $\gamma_{pf}^{-t} (G)$. Where $\gamma_{pf}^{t} (G)$ is proved here to be increasing by adding an edge and decreasing by removing an edge, which are impossible cases in the ordinary total domination number.

Keywords

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International Journal of Nonlinear Analysis and Applications

Articles in Press, Corrected Proof
Available Online from 04 May 2024
  • Receive Date: 24 February 2021
  • Accept Date: 25 April 2021