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when toggle format what by license comment
Apr 10, 2010 at 2:34 vote accept Fei YE
Apr 9, 2010 at 2:45 comment added Hailong Dao See this question also: mathoverflow.net/questions/7559/…
Apr 9, 2010 at 2:21 answer added user1594 timeline score: 15
Apr 9, 2010 at 1:43 history asked Fei YE CC BY-SA 2.5