{"title":"((欧拉图的可收缩边-正则))","authors":"A. A. Sangoor","doi":"10.32792/utq/utj/vol11/4/3","DOIUrl":null,"url":null,"abstract":"In this paper define the contractible edge eulerian graph that, let is a class of Eulerian graphs , the edge e in is called contractible edge eulerian graph if . The necessary conditions for Eulerian graphs to have contractible edge eulerian have been introduced, further, the even and odd contractible edge eulerian graph have been studied , we also define the contractible edge eulerian graph class, the edge e in G is satisfied property contraction is called contractible edge eulerian if . Tutte [7] proved every 3-connected graph non isomorphic to have 3-contractible and proved every 3-connected graph on more than four vertices contains an edge whose contraction yield a new 3-connected graph [7]. We proved graph G is eulerian graph has contractible edge if non isomorphic to . How over every 4-connected graph on at least seven vertices can be reduced to smaller 4-connected graph by contraction one or two edge subsequently [7]. Also we discussed the graph G is eulerian on at least seven vertices can be contraction and saved the properties of eulerian graph. Let be a regular graph and eulerian graph, the edges e in is called contractible regular-eulerian graph if is regular-eulerian grah, We discussed relation contraction of eulerian-regular graph then has contractible if if then has not contractible regular-eulerian.","PeriodicalId":23465,"journal":{"name":"University of Thi-Qar Journal","volume":"39 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"((Contractible Edge of Eulerian Graph- Regular ))\",\"authors\":\"A. A. Sangoor\",\"doi\":\"10.32792/utq/utj/vol11/4/3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper define the contractible edge eulerian graph that, let is a class of Eulerian graphs , the edge e in is called contractible edge eulerian graph if . The necessary conditions for Eulerian graphs to have contractible edge eulerian have been introduced, further, the even and odd contractible edge eulerian graph have been studied , we also define the contractible edge eulerian graph class, the edge e in G is satisfied property contraction is called contractible edge eulerian if . Tutte [7] proved every 3-connected graph non isomorphic to have 3-contractible and proved every 3-connected graph on more than four vertices contains an edge whose contraction yield a new 3-connected graph [7]. We proved graph G is eulerian graph has contractible edge if non isomorphic to . How over every 4-connected graph on at least seven vertices can be reduced to smaller 4-connected graph by contraction one or two edge subsequently [7]. Also we discussed the graph G is eulerian on at least seven vertices can be contraction and saved the properties of eulerian graph. Let be a regular graph and eulerian graph, the edges e in is called contractible regular-eulerian graph if is regular-eulerian grah, We discussed relation contraction of eulerian-regular graph then has contractible if if then has not contractible regular-eulerian.\",\"PeriodicalId\":23465,\"journal\":{\"name\":\"University of Thi-Qar Journal\",\"volume\":\"39 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-04-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"University of Thi-Qar Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.32792/utq/utj/vol11/4/3\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"University of Thi-Qar Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.32792/utq/utj/vol11/4/3","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
In this paper define the contractible edge eulerian graph that, let is a class of Eulerian graphs , the edge e in is called contractible edge eulerian graph if . The necessary conditions for Eulerian graphs to have contractible edge eulerian have been introduced, further, the even and odd contractible edge eulerian graph have been studied , we also define the contractible edge eulerian graph class, the edge e in G is satisfied property contraction is called contractible edge eulerian if . Tutte [7] proved every 3-connected graph non isomorphic to have 3-contractible and proved every 3-connected graph on more than four vertices contains an edge whose contraction yield a new 3-connected graph [7]. We proved graph G is eulerian graph has contractible edge if non isomorphic to . How over every 4-connected graph on at least seven vertices can be reduced to smaller 4-connected graph by contraction one or two edge subsequently [7]. Also we discussed the graph G is eulerian on at least seven vertices can be contraction and saved the properties of eulerian graph. Let be a regular graph and eulerian graph, the edges e in is called contractible regular-eulerian graph if is regular-eulerian grah, We discussed relation contraction of eulerian-regular graph then has contractible if if then has not contractible regular-eulerian.