Thu, 18 Jan 2001 20:36:57 +0100 wenzelm use Sign.PureN, Sign.CPureN;
Thu, 18 Jan 2001 20:36:31 +0100 wenzelm Sign.exists_stamp;
Thu, 18 Jan 2001 20:36:08 +0100 wenzelm tuned \<And> and \<Or>;
(0) -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip