🌐한국어EnglishDeutschEspañolFrançaisItalianoРусский한국어中文日本語EntityQ565198· pop 11· linked from 27 articles구면 뒤집기Also known as Sphere eversion, Turning a sphere inside-outtopological operation of turning a sphere inside-out without creasingWikidata factsImageThurston Sphere Eversion.jpgSources (1)wikidata.orgvia Wikidata · CC0Available in 10 languagesEspañolFrançaisDeutsch中文РусскийItalianoSlovenianUkrainian한국어via Wikidata sitelinks · CC0ConnectionsInternational Standard Book NumberEntitytopologyEntityCategoriesDifferential topologyMathematical paradoxes