Thu, 25 Mar 2010 11:10:15 +0100 Cezary Kaliszyk Showed Let substitution.
Thu, 25 Mar 2010 11:01:22 +0100 Cezary Kaliszyk Only let substitution is left.
Thu, 25 Mar 2010 10:44:14 +0100 Cezary Kaliszyk further in the proof
(0) -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 tip