replaced apply-style proof for instance Multiset :: plus_ac0 by recommended Isar proof style
(* Title: HOLCF/Up2.thy
ID: $Id$
Author: Franz Regensburger
License: GPL (GNU GENERAL PUBLIC LICENSE)
Class Instance u::(pcpo)po
*)
Up2 = Up1 +
instance u :: (pcpo)po (refl_less_up,antisym_less_up,trans_less_up)
end