{"title":"Extremal Edge General Position Sets in Some Graphs","authors":"","doi":"10.1007/s00373-024-02770-z","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>A set of edges <span> <span>\\(X\\subseteq E(G)\\)</span> </span> of a graph <em>G</em> is an edge general position set if no three edges from <em>X</em> lie on a common shortest path. The edge general position number <span> <span>\\({\\textrm{gp}}_{\\textrm{e}}(G)\\)</span> </span> of <em>G</em> is the cardinality of a largest edge general position set in <em>G</em>. Graphs <em>G</em> with <span> <span>\\({\\textrm{gp}}_{{\\textrm{e}}}(G) = |E(G)| - 1\\)</span> </span> and with <span> <span>\\({\\textrm{gp}}_{{\\textrm{e}}}(G) = 3\\)</span> </span> are respectively characterized. Sharp upper and lower bounds on <span> <span>\\({\\textrm{gp}}_{{\\textrm{e}}}(G)\\)</span> </span> are proved for block graphs <em>G</em> and exact values are determined for several specific block graphs.</p>","PeriodicalId":0,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1007/s00373-024-02770-z","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A set of edges \(X\subseteq E(G)\) of a graph G is an edge general position set if no three edges from X lie on a common shortest path. The edge general position number \({\textrm{gp}}_{\textrm{e}}(G)\) of G is the cardinality of a largest edge general position set in G. Graphs G with \({\textrm{gp}}_{{\textrm{e}}}(G) = |E(G)| - 1\) and with \({\textrm{gp}}_{{\textrm{e}}}(G) = 3\) are respectively characterized. Sharp upper and lower bounds on \({\textrm{gp}}_{{\textrm{e}}}(G)\) are proved for block graphs G and exact values are determined for several specific block graphs.