🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsРусскийفارسی한국어中文日本語EntityQ1142861· pop 15· linked from 143 articlesdirect sum of modulesoperation in abstract algebraAvailable in 15 languagesEspañolDeutsch日本語РусскийPortuguêsItalianoBasqueCatalanFinnishHebrewNederlandsConnectionsmoduleEntityinner product spaceEntityCategoriesLinear algebraModule theory