Wed, 18 Jun 1997 15:31:31 +0200 paulson Addition of not_imp (which pushes negation into implication) as a default
Wed, 18 Jun 1997 15:30:32 +0200 paulson Corrected Title in header lines
(0) -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip