Tue, 09 Oct 2012 16:58:36 +0200 kuncar use Set.filter instead of Finite_Set.filter, which is removed then
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip