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May 28, 2022 at 16:14 history edited Martin Sleziak CC BY-SA 4.0
http -> https (the question was bumped anyway)
Nov 6, 2015 at 22:11 comment added Danu @JohnStillwell I think it's worthwhile to incorporate this comment into the answer for completeness (remember: comments are not meant to be of lasting value
Feb 3, 2010 at 2:30 history edited John Stillwell CC BY-SA 2.5
Fixed spelling of "Smale"
Feb 3, 2010 at 1:51 comment added John Stillwell Sorry, I didn't make myself clear. Smale proved a general result about immersions of spheres of arbitrary dimension (I don't know the details). His advisor Raoul Bott pointed out that the general result implied that the 2-sphere could be smoothly turned inside-out in $\mathbb{R}^3$, which he thought was obviously wrong. But Smale's general result was correct, and this led to the discovery of the explicit eversions of the 2-sphere mentioned in the Wikipedia article.
Feb 3, 2010 at 1:27 comment added Vectornaut I can't find anything in the Wikipedia article about Smale's eversion looking like an "obvious counterexample" to anything. Can you give us some more sources or information?
Feb 3, 2010 at 1:26 history edited Steve Huntsman CC BY-SA 2.5
added link
Feb 3, 2010 at 1:21 history answered John Stillwell CC BY-SA 2.5