Wed, 24 Nov 1999 13:35:31 +0100 prove_goal thy;
wenzelm [Wed, 24 Nov 1999 13:35:31 +0100] rev 8030
prove_goal thy;
(0) -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip