Sun, 30 Dec 2012 16:23:30 +0100 wenzelm uniform notation for == and \<equiv> (cf. 3e3c2af5e8a5);
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 tip