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src/HOL/ex/LocaleTest2.thy
changeset 61565 352c73a689da
parent 61343 5b5656a63bd6
child 61566 c3d6e570ccef 
--- a/src/HOL/ex/LocaleTest2.thy	Tue Nov 03 18:11:59 2015 +0100
+++ b/src/HOL/ex/LocaleTest2.thy	Wed Nov 04 08:13:49 2015 +0100
@@ -826,7 +826,7 @@
 proof -
   have "hom one +++ zero = hom one +++ hom one"
     by (simp add: hom_mult [symmetric] del: hom_mult)
-  then show ?thesis by (simp del: r_one)
+  then show ?thesis by (simp del: sum.r_one)
 qed
 
 end
isabelle