Wed, 06 Jan 1999 14:21:44 +0100 nipkow Simplified proof.
Wed, 06 Jan 1999 13:24:33 +0100 paulson induct_tac and exhaust_tac
Wed, 06 Jan 1999 13:23:41 +0100 paulson primrec, induct_tac
(0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip