🌐EnglishEnglishPortuguêsРусский日本語EntityQ6454025· pop 5· linked from 12 articlesKöthe conjectureopen Problem in Ring Theory (Mathematics)Available in 5 languages日本語РусскийFinnishHebrewvia Wikidata sitelinks · CC0ConnectionsidealEntitymathematicsEntityCategoriesConjecturesRing theoryUnsolved problems in mathematics