Wed, 07 May 2008 10:59:27 +0200 berghofe Deleted instantiation "set :: (enum) enum"
Wed, 07 May 2008 10:59:24 +0200 berghofe Replaced + and * on sets by \<oplus> and \<otimes>, to avoid clash with
(0) -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip