Sat, 01 Apr 2017 08:05:40 +0200 nipkow tuned
Fri, 31 Mar 2017 17:21:36 +0200 nipkow more lemmas
Thu, 23 Mar 2017 17:20:47 +0100 wenzelm tuned proof;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 tip