diff -r 46f59511b7bb -r d97fdabd9e2b src/HOL/IMP/Abs_Int0.thy
--- a/src/HOL/IMP/Abs_Int0.thy	Fri Sep 20 19:07:10 2024 +0200
+++ b/src/HOL/IMP/Abs_Int0.thy	Fri Sep 20 19:51:08 2024 +0200
@@ -317,20 +317,20 @@
 assumes h: "m x \<le> h"
 begin
 
-definition m_s :: "'av st \<Rightarrow> vname set \<Rightarrow> nat" ("m\<^sub>s") where
+definition m_s :: "'av st \<Rightarrow> vname set \<Rightarrow> nat" (\<open>m\<^sub>s\<close>) where
 "m_s S X = (\<Sum> x \<in> X. m(S x))"
 
 lemma m_s_h: "finite X \<Longrightarrow> m_s S X \<le> h * card X"
 by(simp add: m_s_def) (metis mult.commute of_nat_id sum_bounded_above[OF h])
 
-fun m_o :: "'av st option \<Rightarrow> vname set \<Rightarrow> nat" ("m\<^sub>o") where
+fun m_o :: "'av st option \<Rightarrow> vname set \<Rightarrow> nat" (\<open>m\<^sub>o\<close>) where
 "m_o (Some S) X = m_s S X" |
 "m_o None X = h * card X + 1"
 
 lemma m_o_h: "finite X \<Longrightarrow> m_o opt X \<le> (h*card X + 1)"
 by(cases opt)(auto simp add: m_s_h le_SucI dest: m_s_h)
 
-definition m_c :: "'av st option acom \<Rightarrow> nat" ("m\<^sub>c") where
+definition m_c :: "'av st option acom \<Rightarrow> nat" (\<open>m\<^sub>c\<close>) where
 "m_c C = sum_list (map (\<lambda>a. m_o a (vars C)) (annos C))"
 
 text\<open>Upper complexity bound:\<close>
@@ -359,14 +359,14 @@
 the finitely many variables in the program change. That the others do not change
 follows because they remain \<^term>\<open>\<top>\<close>.\<close>
 
-fun top_on_st :: "'av st \<Rightarrow> vname set \<Rightarrow> bool" ("top'_on\<^sub>s") where
+fun top_on_st :: "'av st \<Rightarrow> vname set \<Rightarrow> bool" (\<open>top'_on\<^sub>s\<close>) where
 "top_on_st S X = (\<forall>x\<in>X. S x = \<top>)"
 
-fun top_on_opt :: "'av st option \<Rightarrow> vname set \<Rightarrow> bool" ("top'_on\<^sub>o") where
+fun top_on_opt :: "'av st option \<Rightarrow> vname set \<Rightarrow> bool" (\<open>top'_on\<^sub>o\<close>) where
 "top_on_opt (Some S) X = top_on_st S X" |
 "top_on_opt None X = True"
 
-definition top_on_acom :: "'av st option acom \<Rightarrow> vname set \<Rightarrow> bool" ("top'_on\<^sub>c") where
+definition top_on_acom :: "'av st option acom \<Rightarrow> vname set \<Rightarrow> bool" (\<open>top'_on\<^sub>c\<close>) where
 "top_on_acom C X = (\<forall>a \<in> set(annos C). top_on_opt a X)"
 
 lemma top_on_top: "top_on_opt \<top> X"