replaced apply-style proof for instance Multiset :: plus_ac0 by recommended Isar proof style
(* Title: HOLCF/Sprod2.thy
ID: $Id$
Author: Franz Regensburger
License: GPL (GNU GENERAL PUBLIC LICENSE)
Class Instance **::(pcpo,pcpo)po
*)
Sprod2 = Sprod1 +
instance "**"::(pcpo,pcpo)po
(refl_less_sprod, antisym_less_sprod, trans_less_sprod)
end