Thu, 01 Oct 1998 20:33:01 +0200 wenzelm white border -- disabled;
Thu, 01 Oct 1998 18:30:44 +0200 nipkow Improved definition of foldSet.
Thu, 01 Oct 1998 18:30:05 +0200 paulson revised for new treatment of integers
(0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip