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when toggle format what by license comment
Jul 24, 2011 at 19:36 comment added Qing Liu Your three points should be $(0:1), (1:0)$ and $(1:1)$.
Jul 24, 2011 at 19:35 history edited Qing Liu
delette a tag
Jul 24, 2011 at 19:33 answer added Qing Liu timeline score: 3
Jul 24, 2011 at 12:13 history asked Enchanted CC BY-SA 3.0