Wed, 26 Jan 2011 22:23:56 +0000 urbanc made the theory work under both Isabelle 2009 and 2011
Wed, 26 Jan 2011 14:13:18 +0000 zhang Just checkin
Wed, 26 Jan 2011 14:12:36 +0000 zhang Small modification
(0) -30 -10 -3 +3 +10 +30 +100 +300 tip