Mon, 19 Feb 2018 10:05:37 +0100 wenzelm more operations;
Mon, 19 Feb 2018 13:56:16 +0100 nipkow added lemma
Sun, 18 Feb 2018 20:08:21 +0100 wenzelm tuned;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 tip