🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisPortuguêsРусскийفارسی한국어中文日本語EntityQ3041173· pop 14· linked from 132 articlesgroup extensiongroup for which a given group is a normal subgroupAvailable in 14 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsBahasa IndonesiaCatalanFinnishUkrainianConnectionsquotient groupEntityexact sequenceEntityCategoriesGroup theory