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src/HOL/Algebra/poly/LongDiv.thy
changeset 22384 33a46e6c7f04
parent 21423 6cdd0589aa73
child 24742 73b8b42a36b6 
--- a/src/HOL/Algebra/poly/LongDiv.thy	Fri Mar 02 12:38:58 2007 +0100
+++ b/src/HOL/Algebra/poly/LongDiv.thy	Fri Mar 02 15:43:15 2007 +0100
@@ -21,7 +21,7 @@
    apply (induct_tac m)
     apply simp
    apply force
-  apply (simp add: ab_semigroup_add_class.add_commute [of m]) 
+  apply (simp add: add_commute [of m]) 
   done
 
 lemma SUM_extend_below:
isabelle