Tue, 26 Jun 2007 18:32:24 +0200 paulson recoded
Tue, 26 Jun 2007 18:28:40 +0200 paulson simplified
Tue, 26 Jun 2007 15:48:24 +0200 paulson completed some references
Tue, 26 Jun 2007 15:48:09 +0200 paulson changes for type class ring_no_zero_divisors
(0) -10000 -3000 -1000 -300 -100 -30 -10 -4 +4 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip