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Jun 6, 2013 at 14:00 answer added Tom Goodwillie timeline score: 3
S Jun 6, 2013 at 11:30 vote accept Allen
Jun 6, 2013 at 11:29 vote accept Allen
S Jun 6, 2013 at 11:30
Jun 6, 2013 at 9:12 answer added Allen Hatcher timeline score: 10
Jun 6, 2013 at 6:55 vote accept Allen
Jun 6, 2013 at 11:29
Jun 6, 2013 at 4:39 answer added Tyler Lawson timeline score: 15
Jun 6, 2013 at 2:45 comment added Allen Sorry, I always mean nonzero torsion element here.
Jun 6, 2013 at 2:29 comment added Chris Gerig This is more appropriate for this forum: math.stackexchange.com (anyway: take $X=S^1$).
Jun 6, 2013 at 1:53 history asked Allen CC BY-SA 3.0