{"title":"Normal subgroups of the modular group","authors":"L. Greenberg, M. Newman","doi":"10.6028/JRES.074B.012","DOIUrl":null,"url":null,"abstract":"A numbe r of res ults o n the normal s ubgroup stru cture of th e class ical modul ar group is a nn o un ced. A t ypi cal res ult is th at a normal subgroup of squ are-free ind ex is necessaril y of ge nu s 1, a pa rt from 4 excep ti ons.","PeriodicalId":166823,"journal":{"name":"Journal of Research of the National Bureau of Standards, Section B: Mathematical Sciences","volume":"41 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1970-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Research of the National Bureau of Standards, Section B: Mathematical Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6028/JRES.074B.012","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
Abstract
A numbe r of res ults o n the normal s ubgroup stru cture of th e class ical modul ar group is a nn o un ced. A t ypi cal res ult is th at a normal subgroup of squ are-free ind ex is necessaril y of ge nu s 1, a pa rt from 4 excep ti ons.
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