🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsTiếng ViệtРусский中文EntityQ1637549· pop 10· linked from 97 articlesreflexive closureoperation on binary relationsAvailable in 10 languagesEspañolDeutsch中文PortuguêsBasqueGreekTamilTiếng ViệtUkrainianvia Wikidata sitelinks · CC0Connectionspartially ordered setEntityordered fieldEntityCategoriesBinary relationsClosure operatorsRewriting systems