On the safe set of Cartesian product of two complete graphs

Bumtle Kang, Suh-Ryung Kim, Boram Park

For a connected graph $G$, a vertex subset $S$ of $V(G)$ is a safe set if for every component $C$ of the subgraph of $G$ induced by $S$, $|C|\ge |D|$ holds for every component $D$…