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Jan 1, 2013 at 10:12 vote accept alvarezpaiva
Jan 1, 2013 at 0:41 answer added Robert Bryant timeline score: 13
Dec 31, 2012 at 15:20 history edited alvarezpaiva CC BY-SA 3.0
Changed the scope of the question since the original algebraic formulation had a simple answer and was not interesting.
Dec 31, 2012 at 12:58 history edited alvarezpaiva CC BY-SA 3.0
added 742 characters in body; deleted 738 characters in body
Dec 31, 2012 at 12:29 history asked alvarezpaiva CC BY-SA 3.0