Thu, 23 Nov 2000 21:29:50 +0100 wenzelm standard: close_derivation;
Thu, 23 Nov 2000 21:29:35 +0100 wenzelm * HOL: syntax or "abs";
(0) -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip