🌐EnglishEnglishDeutschFrançaisItalianoPortuguêsSvenska한국어中文日本語EntityQ877149· pop 12· linked from 372 articleselementary equivalenceConcept in model theoryAvailable in 12 languagesFrançaisDeutsch中文日本語PortuguêsItalianoBanglaCzechEsperantoSvenskaConnectionsfirst-order logicEntitysemantic theory of truthEntityCategoriesEquivalence (mathematics)Mathematical logicModel theory