A1 Refereed original research article in a scientific journal

Proximinal sets and connectedness in graphs




AuthorsChaira Karim, Dovgoshey Oleksiy

PublisherSpringer

Publication year2023

JournalJournal of Mathematical Sciences

Journal name in sourceJournal of Mathematical Sciences (United States)

Volume273

Issue3

First page 333

Last page350

DOIhttps://doi.org/10.1007/s10958-023-06502-1

Web address https://doi.org/10.1007/s10958-023-06502-1


Abstract

TLet G be a graph with a vertex set V. The graph G is path-proximinal if there is a semimetric d : V × V → [0, ∞[and disjoint proximinal subsets of the semimetric space (V, d) such that V = A ∪ B. The vertices u, v ∈ V are adjacent iff d(uv)⩽inf{d(xy):x∈Ay∈B}, and, for every p ∈ V , there is a path connecting A and B in G, and passing through p. It has been shown that a graph is path-proximinal if and only if all of its vertices are not isolated. It has also been shown that a graph is simultaneously proximinal and path-proximinal for an ultrametric if and only if the degree of each of its vertices is equal to 1.



Last updated on 2024-26-11 at 20:36