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src/HOL/IMP/Abs_Int_Den/Abs_Int_den1_ivl.thy
changeset 57512 cc97b347b301
parent 56927 4044a7d1720f
child 58249 180f1b3508ed 
--- a/src/HOL/IMP/Abs_Int_Den/Abs_Int_den1_ivl.thy	Fri Jul 04 20:07:08 2014 +0200
+++ b/src/HOL/IMP/Abs_Int_Den/Abs_Int_den1_ivl.thy	Fri Jul 04 20:18:47 2014 +0200
@@ -193,7 +193,7 @@
 proof
   case goal1 thus ?case
     by(auto simp add: filter_plus_ivl_def)
-      (metis rep_minus_ivl add_diff_cancel add_commute)+
+      (metis rep_minus_ivl add_diff_cancel add.commute)+
 next
   case goal2 thus ?case
     by(cases a1, cases a2,
isabelle