🌐EnglishEnglishDeutschEspañolFrançaisItalianoPortuguêsTiếng ViệtРусский한국어中文日本語EntityQ1454165· pop 12· linked from 199 articlesfree productoperation that takes two groups G and H and constructs a new group G ∗ HConnectionsLie groupEntitygroup homomorphismEntityCategoriesAlgebraic topologyFree algebraic structuresGroup products