{"title":"A parallel lagrangian heuristic for the fractional chromatic number of a graph","authors":"P. Araújo, Ricardo C. Corrêa, Manoel B. Campêlo","doi":"10.1051/ro/2023062","DOIUrl":null,"url":null,"abstract":"We propose a new integer programming formulation for the Fractional Chromatic Number Problem. The formulation is based on representatives of stable sets. In addition, we present a Lagrangian heuristic from a Lagrangian relaxation of this formulation to obtain a good feasible solution for the problem.\nComputational experiments are presented to evaluate and compare the upper and lower bounds provided by our approach.","PeriodicalId":20872,"journal":{"name":"RAIRO Oper. Res.","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"RAIRO Oper. Res.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1051/ro/2023062","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
We propose a new integer programming formulation for the Fractional Chromatic Number Problem. The formulation is based on representatives of stable sets. In addition, we present a Lagrangian heuristic from a Lagrangian relaxation of this formulation to obtain a good feasible solution for the problem.
Computational experiments are presented to evaluate and compare the upper and lower bounds provided by our approach.
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