{"title":"d\n \n $d$\n -connectivity of the random graph with restricted budget","authors":"Lyuben Lichev","doi":"10.1002/jgt.23180","DOIUrl":null,"url":null,"abstract":"<p>In this short note, we consider a graph process recently introduced by Frieze, Krivelevich and Michaeli. In their model, the edges of the complete graph <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>K</mi>\n \n <mi>n</mi>\n </msub>\n </mrow>\n <annotation> ${K}_{n}$</annotation>\n </semantics></math> are ordered uniformly at random and are then revealed consecutively to a player called Builder. At every round, Builder must decide if they accept the edge proposed at this round or not. We prove that, for every <span></span><math>\n <semantics>\n <mrow>\n <mi>d</mi>\n \n <mo>≥</mo>\n \n <mn>2</mn>\n </mrow>\n <annotation> $d\\ge 2$</annotation>\n </semantics></math>, Builder can construct a spanning <span></span><math>\n <semantics>\n <mrow>\n <mi>d</mi>\n </mrow>\n <annotation> $d$</annotation>\n </semantics></math>-connected graph after <span></span><math>\n <semantics>\n <mrow>\n <mrow>\n <mo>(</mo>\n \n <mn>1</mn>\n \n <mo>+</mo>\n \n <mi>o</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mn>1</mn>\n \n <mo>)</mo>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n \n <mi>n</mi>\n \n <mi>log</mi>\n \n <mo> </mo>\n \n <mi>n</mi>\n \n <mo>/</mo>\n \n <mn>2</mn>\n </mrow>\n <annotation> $(1+o(1))n\\mathrm{log}\\unicode{x0200A}n/2$</annotation>\n </semantics></math> rounds by accepting <span></span><math>\n <semantics>\n <mrow>\n <mrow>\n <mo>(</mo>\n \n <mn>1</mn>\n \n <mo>+</mo>\n \n <mi>o</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mn>1</mn>\n \n <mo>)</mo>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n \n <mi>d</mi>\n \n <mi>n</mi>\n \n <mo>/</mo>\n \n <mn>2</mn>\n </mrow>\n <annotation> $(1+o(1))dn/2$</annotation>\n </semantics></math> edges with probability converging to 1 as <span></span><math>\n <semantics>\n <mrow>\n <mi>n</mi>\n \n <mo>→</mo>\n \n <mi>∞</mi>\n </mrow>\n <annotation> $n\\to \\infty $</annotation>\n </semantics></math>. This settles a conjecture of Frieze, Krivelevich and Michaeli.</p>","PeriodicalId":16014,"journal":{"name":"Journal of Graph Theory","volume":"108 2","pages":"293-312"},"PeriodicalIF":0.9000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Graph Theory","FirstCategoryId":"100","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jgt.23180","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this short note, we consider a graph process recently introduced by Frieze, Krivelevich and Michaeli. In their model, the edges of the complete graph are ordered uniformly at random and are then revealed consecutively to a player called Builder. At every round, Builder must decide if they accept the edge proposed at this round or not. We prove that, for every , Builder can construct a spanning -connected graph after rounds by accepting edges with probability converging to 1 as . This settles a conjecture of Frieze, Krivelevich and Michaeli.
期刊介绍:
The Journal of Graph Theory is devoted to a variety of topics in graph theory, such as structural results about graphs, graph algorithms with theoretical emphasis, and discrete optimization on graphs. The scope of the journal also includes related areas in combinatorics and the interaction of graph theory with other mathematical sciences.
A subscription to the Journal of Graph Theory includes a subscription to the Journal of Combinatorial Designs .