Mon, 29 Apr 1996 15:48:27 +0200 nipkow Natural and Transition semantics.
Sat, 27 Apr 1996 18:51:42 +0200 nipkow Forgot to add Expr to IMP.
(0) -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip