Wed, 02 Jan 2008 15:14:02 +0100 haftmann splitted class uminus from class minus
Wed, 02 Jan 2008 12:22:38 +0100 paulson testing for empty sort
Wed, 02 Jan 2008 12:22:05 +0100 paulson new metis proofs
(0) -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip