{"title":"Prime divisors and the number of conjugacy classes of finite groups","authors":"THOMAS MICHAEL KELLER, ALEXANDER MORETÓ","doi":"10.1017/s030500412300035x","DOIUrl":null,"url":null,"abstract":"We prove that there exists a universal constant <jats:italic>D</jats:italic> such that if <jats:italic>p</jats:italic> is a prime divisor of the index of the Fitting subgroup of a finite group <jats:italic>G</jats:italic>, then the number of conjugacy classes of <jats:italic>G</jats:italic> is at least <jats:inline-formula> <jats:alternatives> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S030500412300035X_inline1.png\" /> <jats:tex-math> $Dp/\\log_2p$ </jats:tex-math> </jats:alternatives> </jats:inline-formula>. We conjecture that we can take <jats:inline-formula> <jats:alternatives> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S030500412300035X_inline2.png\" /> <jats:tex-math> $D=1$ </jats:tex-math> </jats:alternatives> </jats:inline-formula> and prove that for solvable groups, we can take <jats:inline-formula> <jats:alternatives> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S030500412300035X_inline3.png\" /> <jats:tex-math> $D=1/3$ </jats:tex-math> </jats:alternatives> </jats:inline-formula>.","PeriodicalId":18320,"journal":{"name":"Mathematical Proceedings of the Cambridge Philosophical Society","volume":"14 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematical Proceedings of the Cambridge Philosophical Society","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.1017/s030500412300035x","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 1
Abstract
We prove that there exists a universal constant D such that if p is a prime divisor of the index of the Fitting subgroup of a finite group G, then the number of conjugacy classes of G is at least $Dp/\log_2p$ . We conjecture that we can take $D=1$ and prove that for solvable groups, we can take $D=1/3$ .
期刊介绍:
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