🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийالعربيةفارسی한국어中文日本語EntityQ1326955· pop 22· linked from 302 articlesexact sequencesequence of homomorphisms such that each kernel equals the preceding imageAvailable in 21 languagesEspañolFrançaisDeutsch中文日本語РусскийItalianoالعربيةBahasa IndonesiaCatalanHebrewConnectionsmorphismEntityabelian categoryEntityCategoriesAdditive categoriesHomological algebra