Thu, 14 Jan 2010 18:41:50 +0100 Christian Urban removed one sorry
Thu, 14 Jan 2010 18:35:38 +0100 Christian Urban nearly all of the proof
Thu, 14 Jan 2010 17:57:20 +0100 Christian Urban right generalisation
Thu, 14 Jan 2010 17:53:23 +0100 Cezary Kaliszyk First subgoal.
(0) -300 -100 -30 -10 -4 +4 +10 +30 +100 +300 +1000 tip