References & Citations
Mathematics > Combinatorics
Title: Strong domination number of Hajós sum and vertex-sum of two graphs
(Submitted on 2 Feb 2023)
Abstract: Let $G=(V,E)$ be a simple graph. A set $D\subseteq V$ is a strong dominating set of $G$, if for every vertex $x\in V\setminus D$ there is a vertex $y\in D$ with $xy\in E(G)$ and $deg(x)\leq deg(y)$. The strong domination number $\gamma_{st}(G)$ is defined as the minimum cardinality of a strong dominating set. In this paper, we study the strong domination number of Haj\'{o}s sum and vertex-sum of two graphs.
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