Fri, 30 Dec 2016 18:02:27 +0100 haftmann complete set of cases rules for integers known to be (non-)positive/negative;
Fri, 30 Dec 2016 18:02:27 +0100 haftmann more facts on sgn, abs
Fri, 30 Dec 2016 18:02:27 +0100 haftmann dropped slightly outdated comment
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 tip