Tue, 13 Jul 1999 10:42:31 +0200 paulson renamed sort "numeral" to "number"
Tue, 13 Jul 1999 10:41:59 +0200 paulson simplified the <= monotonicity proof
(0) -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip