RT journal article T1 Further Contributions on the Outer Multiset Dimension of Graphs A1 Klavžar, Sandi A1 Kuziak, Dorota A1 González Yero, Ismael A2 Estadística e Investigación Operativa A2 Matemáticas K1 grids K1 lexicographic product of graphs K1 outer multiset dimension K1 Outer multiset resolving set AB The outer multiset dimension dim ms(G) of a graph G is the cardinality of a smallest set of vertices that uniquely recognize all the vertices outside this set by using multisets of distances to the set. It is proved that dim ms(G) = n(G) - 1 if and only if G is a regular graph with diameter at most 2. Graphs G with dim ms(G) = 2 are described and recognized in polynomial time. A lower bound on the lexicographic product of G and H is proved when H is complete or edgeless, and the extremal graphs are determined. It is proved that dimms(Ps□Pt)=3 for s≥ t≥ 2. PB Springer SN 1422-6383 YR 2022 FD 2022-12-31 LK http://hdl.handle.net/10498/29371 UL http://hdl.handle.net/10498/29371 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 11-nov-2026