Edge and mixed metric dimension of Johnson graphs

In this paper, both edge and mixed metric dimensions of Johnson graphs $J_{n,k}$ are considered. A new tight lower bound for $\beta_E(J_{n,k})$ based on hitting sets has been obtained. Using this bound, exact values for $\beta_E(J_{n,2})$ and $\beta_M(J_{n,2})$ have been derived, and it is proved that $\beta_E(J_{n,2}) = \beta_M(J_{n,2})$.