{"title":"Completing the solution of the directed Oberwolfach problem with cycles of equal length","authors":"Alice Lacaze-Masmonteil","doi":"10.1002/jcd.21918","DOIUrl":null,"url":null,"abstract":"<p>In this paper, we give a solution to the last outstanding case of the directed Oberwolfach problem with tables of uniform length. Namely, we address the two-table case with tables of equal odd length. We prove that the complete symmetric digraph on <math>\n <semantics>\n <mrow>\n <mn>2</mn>\n <mi>m</mi>\n </mrow>\n <annotation> $2m$</annotation>\n </semantics></math> vertices, denoted <math>\n <semantics>\n <mrow>\n <msubsup>\n <mi>K</mi>\n <mrow>\n <mn>2</mn>\n <mi>m</mi>\n </mrow>\n <mo>*</mo>\n </msubsup>\n </mrow>\n <annotation> ${K}_{2m}^{* }$</annotation>\n </semantics></math>, admits a resolvable decomposition into directed cycles of odd length <math>\n <semantics>\n <mrow>\n <mi>m</mi>\n </mrow>\n <annotation> $m$</annotation>\n </semantics></math>. This completely settles the directed Oberwolfach problem with tables of uniform length.</p>","PeriodicalId":15389,"journal":{"name":"Journal of Combinatorial Designs","volume":"32 1","pages":"5-30"},"PeriodicalIF":0.5000,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jcd.21918","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Combinatorial Designs","FirstCategoryId":"100","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jcd.21918","RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 3
Abstract
In this paper, we give a solution to the last outstanding case of the directed Oberwolfach problem with tables of uniform length. Namely, we address the two-table case with tables of equal odd length. We prove that the complete symmetric digraph on vertices, denoted , admits a resolvable decomposition into directed cycles of odd length . This completely settles the directed Oberwolfach problem with tables of uniform length.
期刊介绍:
The Journal of Combinatorial Designs is an international journal devoted to the timely publication of the most influential papers in the area of combinatorial design theory. All topics in design theory, and in which design theory has important applications, are covered, including:
block designs, t-designs, pairwise balanced designs and group divisible designs
Latin squares, quasigroups, and related algebras
computational methods in design theory
construction methods
applications in computer science, experimental design theory, and coding theory
graph decompositions, factorizations, and design-theoretic techniques in graph theory and extremal combinatorics
finite geometry and its relation with design theory.
algebraic aspects of design theory.
Researchers and scientists can depend on the Journal of Combinatorial Designs for the most recent developments in this rapidly growing field, and to provide a forum for both theoretical research and applications. All papers appearing in the Journal of Combinatorial Designs are carefully peer refereed.