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when toggle format what by license comment
Aug 13, 2015 at 13:38 comment added Igor Rivin See the first answer to this question: mathoverflow.net/questions/22583/…
Aug 13, 2015 at 0:32 answer added Qiaochu Yuan timeline score: 4
Aug 13, 2015 at 0:21 history asked dorebell CC BY-SA 3.0