Saturation numbers in tripartite graphs

Eric Sullivan, Paul S. Wenger

Given graphs $H$ and $F$, a subgraph $G\subseteq H$ is an $F$-saturated subgraph of $H$ if $F⊈G$, but $F\subseteq G+e$ for all $e\in E(H)\setminus E(G)$. The saturation n…