Home›Browse›Fσ-Menge🌐DeutschEnglishDeutschFrançaisPolskiPortuguêsРусский中文日本語EntityQ4392123· pop 8· linked from 25 articlesFσ-MengeSign in to savecountable union of closed setsWikidata factsSubclass ofcountable setShow 3 more factsstudied bytopologyopposite ofGδ setmaintained by WikiProjectWikiProject MathematicsSources (1)wikidata.orgvia Wikidata · CC0Available in 8 languagesFrançaisDeutsch中文日本語РусскийPolskiUkrainianvia Wikidata sitelinks · CC0