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Apr 27, 2012 at 7:03 vote accept Lwins
Apr 22, 2012 at 7:24 vote accept Lwins
Apr 27, 2012 at 7:02
Apr 17, 2012 at 12:12 history edited Johan Wästlund CC BY-SA 3.0
added 1714 characters in body; added 25 characters in body
Apr 17, 2012 at 2:57 vote accept Lwins
Apr 22, 2012 at 7:24
Apr 17, 2012 at 2:56 comment added Lwins Wow! It's a wonderful proof. I'm sure you have solved this problem out perfectly. Thanks!^_^ And, I'm feeling grateful to all of you who viewed this problem especially who participate in the discussion about it. I'm wondering, if we change interval $[-1,1]$ to $[l,r]$, can this method work successfully? Or we can use other way to do it?
Apr 17, 2012 at 0:10 history answered Johan Wästlund CC BY-SA 3.0