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Nov 13, 2014 at 20:45 comment added Ryan Budney Some similar threads: mathoverflow.net/questions/83697/… mathoverflow.net/questions/24930/…
Oct 30, 2014 at 18:20 answer added Allen Hatcher timeline score: 24
Oct 27, 2014 at 8:34 history edited Daniel Moskovich
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Oct 24, 2014 at 20:51 vote accept Malte
Oct 24, 2014 at 20:15 comment added Ryan Budney Replace $SO(3)$ by $SO(4)$ in the above...
Oct 24, 2014 at 20:09 answer added Ryan Budney timeline score: 13
Oct 24, 2014 at 15:49 comment added Misha Every orientation-preserving diffeomorphism of $S^3$ is isotopic to the identity. Hatcher proved much more: $SO(3)$ is a deformation retract of $Diff_+(S^3)$.
Oct 24, 2014 at 9:49 review First posts
Oct 24, 2014 at 10:27
Oct 24, 2014 at 9:47 history asked Malte CC BY-SA 3.0