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when toggle format what by license comment
Jun 25, 2013 at 3:02 review Late answers
Jun 26, 2013 at 6:48
May 28, 2012 at 20:07 comment added Ian Agol Did you try plugging in $a=0,b=1$?
May 27, 2012 at 14:34 history answered user24006 CC BY-SA 3.0