Tue, 04 May 1999 17:59:55 +0200 wenzelm isabelle_zf image;
Tue, 04 May 1999 17:59:31 +0200 wenzelm *** empty log message ***
Tue, 04 May 1999 16:49:24 +0200 nipkow Arithmetic.
(0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip