Complexity and equivalency of multiset dimension and ID-colorings
For graph theorists, this work unifies two concepts and provides complexity results, but the contributions are incremental.
The paper proves that multiset resolving sets and ID-colorings are equivalent in graph theory, shows that computing the multiset dimension is NP-complete, and bounds the multiset dimension of king grids by 4.
This investigation is firstly focused into showing that two metric parameters represent the same object in graph theory. That is, we prove that the multiset resolving sets and the ID-colorings of graphs are the same thing. We also consider some computational and combinatorial problems of the multiset dimension, or equivalently, the ID-number of graphs. We prove that the decision problem concerning finding the multiset dimension of graphs is NP-complete. We consider the multiset dimension of king grids and prove that it is bounded above by 4. We also give a characterization of the strong product graphs with one factor being a complete graph, and whose multiset dimension is not infinite.