🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTiếng ViệtРусскийفارسی한국어中文日本語EntityQ1194212· pop 19· linked from 231 articlesring homomorphismmapping between two rings which respects the structureConnectionsinitial and terminal objectsEntitybijectionEntityCategoriesMorphismsRing theory