The eternal domination number of graph \( G \) is the smallest set of mobile guards which can defend \( G \) against an infinite sequence of attacks on its vertices. In this paper we give results for the eternal domination numbers of \( P_4 \Box P_n \).
Citation
I. Beaton, S. Finbow, J.A. MacDonald. Eternal Domination Numbers of \(4 \times n\) Grid Graphs[J], Journal of Combinatorial Mathematics and Combinatorial Computing, Volume 085. 33-48. .