🌐EnglishEnglishDeutschEspañolFrançaisPortuguêsTiếng ViệtРусскийالعربية한국어日本語EntityQ1049869· pop 12· linked from 57 articlesLebesgue numbergiven a cover of a metric space, a positive real number δ such that any set of diameter smaller than δ is a subset of a member of the coverConnectionsmetrizable spaceEntityIntrinsic metricEntityCategoriesLemmasTheorems in topology