replaced apply-style proof for instance Multiset :: plus_ac0 by recommended Isar proof style
(* Title: HOLCF/Cfun2.thy
ID: $Id$
Author: Franz Regensburger
License: GPL (GNU GENERAL PUBLIC LICENSE)
Class Instance ->::(cpo,cpo)po
*)
Cfun2 = Cfun1 +
instance "->"::(cpo,cpo)po (refl_less_cfun,antisym_less_cfun,trans_less_cfun)
end