Thu, 30 Jul 2009 11:38:52 +0200 Christian Urban made changes for SUBPROOF and sat_tac
Tue, 28 Jul 2009 12:11:33 +0200 Christian Urban slightly changed exercises about rev_sum
Tue, 28 Jul 2009 08:53:05 +0200 Christian Urban added more to the ML-antiquotation section
(0) -100 -30 -10 -3 +3 +10 +30 +100 tip