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src/HOL/Library/Set_Algebras.thy
changeset 61585 a9599d3d7610
parent 61337 4645502c3c64
child 63473 151bb79536a7 
--- a/src/HOL/Library/Set_Algebras.thy	Thu Nov 05 10:35:37 2015 +0100
+++ b/src/HOL/Library/Set_Algebras.thy	Thu Nov 05 10:39:49 2015 +0100
@@ -11,7 +11,7 @@
 text \<open>
   This library lifts operations like addition and multiplication to
   sets.  It was designed to support asymptotic calculations. See the
-  comments at the top of theory @{text BigO}.
+  comments at the top of theory \<open>BigO\<close>.
 \<close>
 
 instantiation set :: (plus) plus
isabelle