🌐EnglishEnglishBahasa IndonesiaEspañolFrançaisItalianoPolskiPortuguêsTiếng ViệtРусский한국어中文日本語EntityQ2525646· pop 13· linked from 67 articlescomposition seriesdecomposition of an algebraic structureAvailable in 12 languagesEspañolFrançais中文日本語ItalianoBahasa IndonesiaHebrewPolskiTiếng ViệtUkrainian한국어ConnectionsisomorphismEntitymoduleEntityCategoriesModule theorySubgroup series