Thu, 04 Dec 1997 12:44:37 +0100 nipkow pred n -> n-1
Thu, 04 Dec 1997 09:05:59 +0100 nipkow Simplified proofs.
Thu, 04 Dec 1997 09:05:39 +0100 nipkow Added thm mult_div_cancel
(0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip