On the 3-${\gamma }_t$-Critical Graphs of Order $\Delta (G)+3$

Haoli Wang, Xirong Xu, Yang Yuansheng +1

Let ${\gamma }_t(G)$ be the total domination number of graph $G$, a graph $G$ is $k$-total domination vertex critical (or\ just\ $k$-${\gamma }_t$-critical) if ${\gamma }_t(G)=k$, and for any vertex $v$ o…