🌐EnglishEnglishEspañolFrançaisItalianoNederlandsPortuguêsРусский中文日本語EntityQ939072· pop 6· linked from 15 articlesvon Neumann conjecturedisproved conjecture in group theoryConnectionspresentation of a groupEntitymathematicsEntityCategoriesCombinatorial group theoryDisproved conjecturesGeometric group theoryTopological groups