Mon, 19 Aug 1996 13:03:17 +0200 paulson Tidied up the proofs
Mon, 19 Aug 1996 11:51:39 +0200 paulson Added impOfSubs
Mon, 19 Aug 1996 11:49:31 +0200 paulson Now less_zeroE is a Safe Elim rule
(0) -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip