Fri, 22 Dec 1995 12:25:20 +0100 defined take/drop by induction over list rather than nat.
nipkow [Fri, 22 Dec 1995 12:25:20 +0100] rev 1419
defined take/drop by induction over list rather than nat.
(0) -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip