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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Jun 12, 2012 at 8:33 vote accept crocodile
Jun 9, 2012 at 16:32 comment added crocodile Thanks for pointing this out -- I have corrected the question.
Jun 9, 2012 at 16:32 history edited crocodile CC BY-SA 3.0
corrected correction
Jun 9, 2012 at 16:05 answer added Simon Rose timeline score: 2
Jun 9, 2012 at 16:01 comment added Dustin Cartwright You write that $W=\alpha^{-1}(X) = \beta^{-1}(Y)$, but this would only be true of $Y$ were equal to $\delta^{-1}(Z)$, which isn't true in general.
Jun 9, 2012 at 12:59 history asked crocodile CC BY-SA 3.0