The Equidistant Dimension of Graphs
Asubset S of vertices of a connected graphG is a distance-equalizer set if for every two distinct vertices x, y ∈ V(G)\S there is a vertex w ∈ S such that the distances from x and y to w are the same. The equidistant dimension of G is the minimum cardinality of a distance-equalizer set of G. This pa...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2022 |
| País: | España |
| Recursos: | Universidad de Sevilla (US) |
| Repositório: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/138683 |
| Acesso em linha: | https://hdl.handle.net/11441/138683 https://doi.org/10.1007/s40840-022-01295-z |
| Access Level: | Acceso aberto |
| Palavra-chave: | Distance-equalizer set Equidistant dimension Resolving set Doubly resolving set Metric dimension |
| Resumo: | Asubset S of vertices of a connected graphG is a distance-equalizer set if for every two distinct vertices x, y ∈ V(G)\S there is a vertex w ∈ S such that the distances from x and y to w are the same. The equidistant dimension of G is the minimum cardinality of a distance-equalizer set of G. This paper is devoted to introduce this parameter and explore its properties and applications to other mathematical problems, not necessarily in the context of graph theory. Concretely, we first establish some bounds concerning the order, the maximum degree, the clique number, and the independence number, and characterize all graphs attaining some extremal values. We then study the equidistant dimension of several families of graphs (complete and complete multipartite graphs, bistars, paths, cycles, and Johnson graphs), proving that, in the case of paths and cycles, this parameter is related to 3-AP-free sets. Subsequently, we show the usefulness of distance-equalizer sets for constructing doubly resolving sets. |
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