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when toggle format what by license comment
Aug 15, 2011 at 15:37 comment added roy smith This lovely proof is the one given by Euclid as Prop. VI.31.
Sep 26, 2010 at 13:35 history edited Dick Palais CC BY-SA 2.5
Gave an example; added 4 characters in body; added 1 characters in body
Sep 26, 2010 at 13:07 history answered Dick Palais CC BY-SA 2.5