🌐한국어EnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTiếng ViệtРусскийالعربيةفارسی한국어中文日本語EntityQ126955· pop 20· linked from 131 articles레벨집합subset of a function's domain on which its value is equalWikidata factsImageTrybin.pngSources (1)wikidata.orgvia Wikidata · CC0Available in 20 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAzerbaijaniCatalanConnectionscontour lineEntitymathematicsEntityCategoriesImplicit surface modelingMultivariable calculus