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src/HOL/Quotient_Examples/Lift_Fun.thy
changeset 80914 d97fdabd9e2b
parent 73932 fd21b4a93043 
--- a/src/HOL/Quotient_Examples/Lift_Fun.thy	Fri Sep 20 19:07:10 2024 +0200
+++ b/src/HOL/Quotient_Examples/Lift_Fun.thy	Fri Sep 20 19:51:08 2024 +0200
@@ -19,7 +19,7 @@
   in the following four definitions. This example is based on HOL/Fun.thy.\<close>
 
 quotient_type
-('a, 'b) fun' (infixr "\<rightarrow>" 55) = "'a \<Rightarrow> 'b" / "(=)" 
+('a, 'b) fun' (infixr \<open>\<rightarrow>\<close> 55) = "'a \<Rightarrow> 'b" / "(=)" 
   by (simp add: identity_equivp)
 
 quotient_definition "comp' :: ('b \<rightarrow> 'c) \<rightarrow> ('a \<rightarrow> 'b) \<rightarrow> 'a \<rightarrow> 'c"  is
isabelle