411 REFERENCE · Wiktionary
Smale's paradox
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
First proven in 1957 by Stephen Smale.
Proper noun
en topology The non-intuitive fact that it is possible to turn a sphere inside out in a three-dimensional space with possible self-intersections but without creating any crease.
en eponyms