Sun, 22 Nov 2009 15:27:10 +0100 Christian Urban updated to new Isabelle and clarified Skip_Proof
Sun, 22 Nov 2009 03:13:29 +0100 Christian Urban tuning
Sat, 21 Nov 2009 00:29:43 +0100 Christian Urban tuned
(0) -300 -100 -30 -10 -3 +3 +10 +30 +100 tip