{"title":"图的强制边绕道单音数","authors":"P. Titus, K. Ganesamoorthy","doi":"10.22108/TOC.2021.119182.1670","DOIUrl":null,"url":null,"abstract":"For a connected graph $G=(V,E)$ of order at least two, an edge detour monophonic set of $G$ is a set $S$ of vertices such that every edge of $G$ lies on a detour monophonic path joining some pair of vertices in $S$. The edge detour monophonic number of $G$ is the minimum cardinality of its edge detour monophonic sets and is denoted by $edm(G)$. A subset $T$ of $S$ is a forcing edge detour monophonic subset for $S$ if $S$ is the unique edge detour monophonic set of size $edm(G)$ containing $T$. A forcing edge detour monophonic subset for $S$ of minimum cardinality is a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number $f_{edm}(S)$ in $G$ is the cardinality of a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number of $G$ is $f_{edm}(G)=min{f_{edm}(S)}$, where the minimum is taken over all edge detour monophonic sets $S$ of size $edm(G)$ in $G$. We determine bounds for it and find the forcing edge detour monophonic number of certain classes of graphs. It is shown that for every pair a, b of positive integers with $0leq a","PeriodicalId":43837,"journal":{"name":"Transactions on Combinatorics","volume":"66 1","pages":"201-211"},"PeriodicalIF":0.6000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Forcing edge detour monophonic number of a graph\",\"authors\":\"P. Titus, K. Ganesamoorthy\",\"doi\":\"10.22108/TOC.2021.119182.1670\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"For a connected graph $G=(V,E)$ of order at least two, an edge detour monophonic set of $G$ is a set $S$ of vertices such that every edge of $G$ lies on a detour monophonic path joining some pair of vertices in $S$. The edge detour monophonic number of $G$ is the minimum cardinality of its edge detour monophonic sets and is denoted by $edm(G)$. A subset $T$ of $S$ is a forcing edge detour monophonic subset for $S$ if $S$ is the unique edge detour monophonic set of size $edm(G)$ containing $T$. A forcing edge detour monophonic subset for $S$ of minimum cardinality is a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number $f_{edm}(S)$ in $G$ is the cardinality of a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number of $G$ is $f_{edm}(G)=min{f_{edm}(S)}$, where the minimum is taken over all edge detour monophonic sets $S$ of size $edm(G)$ in $G$. We determine bounds for it and find the forcing edge detour monophonic number of certain classes of graphs. It is shown that for every pair a, b of positive integers with $0leq a\",\"PeriodicalId\":43837,\"journal\":{\"name\":\"Transactions on Combinatorics\",\"volume\":\"66 1\",\"pages\":\"201-211\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2021-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions on Combinatorics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22108/TOC.2021.119182.1670\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions on Combinatorics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22108/TOC.2021.119182.1670","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
摘要
对于至少为2阶的连通图$G=(V,E)$, $G$的边绕行单音集是$S$的顶点集合,使得$G$的每条边都位于连接$S$ $中某些顶点对的绕行单音路径上。$G$的边缘绕行单音数是其边缘绕行单音集的最小基数,用$edm(G)$™表示。$S$的子集$T$是$S$的强制边绕路单音子集,如果$S$是包含$T$的唯一边绕路单音集,其大小为$edm(G)$。最小基数$S$的强制边绕行单音子集是$S$的最小强制边绕行单音子集。$G$中的强制边绕行单音数$f_{edm}(S)$是$S$的最小强制边绕行单音子集的基数。$G$的强制边绕道单音数为$f_{edm}(G)=min{f_{edm}(S)}$ $,其中取$G$ $中大小为$edm(G)$的所有边绕道单音集$S$的最小值。我们确定了它的界,并找到了某些图类的强制边绕道单音数。证明了对于每一对正整数a, b, $0leq a
For a connected graph $G=(V,E)$ of order at least two, an edge detour monophonic set of $G$ is a set $S$ of vertices such that every edge of $G$ lies on a detour monophonic path joining some pair of vertices in $S$. The edge detour monophonic number of $G$ is the minimum cardinality of its edge detour monophonic sets and is denoted by $edm(G)$. A subset $T$ of $S$ is a forcing edge detour monophonic subset for $S$ if $S$ is the unique edge detour monophonic set of size $edm(G)$ containing $T$. A forcing edge detour monophonic subset for $S$ of minimum cardinality is a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number $f_{edm}(S)$ in $G$ is the cardinality of a minimum forcing edge detour monophonic subset of $S$. The forcing edge detour monophonic number of $G$ is $f_{edm}(G)=min{f_{edm}(S)}$, where the minimum is taken over all edge detour monophonic sets $S$ of size $edm(G)$ in $G$. We determine bounds for it and find the forcing edge detour monophonic number of certain classes of graphs. It is shown that for every pair a, b of positive integers with $0leq a