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src/HOL/IMP/Small_Step.thy
changeset 80914 d97fdabd9e2b
parent 69505 cc2d676d5395 
--- a/src/HOL/IMP/Small_Step.thy	Fri Sep 20 19:07:10 2024 +0200
+++ b/src/HOL/IMP/Small_Step.thy	Fri Sep 20 19:51:08 2024 +0200
@@ -5,7 +5,7 @@
 subsection "The transition relation"
 
 inductive
-  small_step :: "com * state \<Rightarrow> com * state \<Rightarrow> bool" (infix "\<rightarrow>" 55)
+  small_step :: "com * state \<Rightarrow> com * state \<Rightarrow> bool" (infix \<open>\<rightarrow>\<close> 55)
 where
 Assign:  "(x ::= a, s) \<rightarrow> (SKIP, s(x := aval a s))" |
 
@@ -20,7 +20,7 @@
 
 
 abbreviation
-  small_steps :: "com * state \<Rightarrow> com * state \<Rightarrow> bool" (infix "\<rightarrow>*" 55)
+  small_steps :: "com * state \<Rightarrow> com * state \<Rightarrow> bool" (infix \<open>\<rightarrow>*\<close> 55)
 where "x \<rightarrow>* y == star small_step x y"
 
 subsection\<open>Executability\<close>
isabelle