Xuan-Long Ma

Graphs attaining an upper bound on the mixed metric dimension

Given a graph $G$, we show that the mixed metric dimension of $G$ is exactly $\ell(G)+2c(G)$ if and only if $G$ is either a cactus graph in which every cycle has precisely one vertex of degree at least $3$, or a balanced $\Theta$-graph, where $\ell(G)$ and $c(G)$ denote the number of leaves and the cyclomatic number of...