tuned;

--- a/src/HOL/Nonstandard_Analysis/HyperDef.thy	Tue Nov 01 00:55:52 2016 +0100
+++ b/src/HOL/Nonstandard_Analysis/HyperDef.thy	Tue Nov 01 01:04:53 2016 +0100
@@ -177,10 +177,10 @@
 lemma star_n_inverse: "inverse (star_n X) = star_n (\<lambda>n. inverse (X n))"
   by (simp only: star_inverse_def starfun_star_n)
 
-lemma star_n_le: "star_n X \<le> star_n Y = eventually (\<lambda>n. X n \<le> Y n) FreeUltrafilterNat"
+lemma star_n_le: "star_n X \<le> star_n Y = eventually (\<lambda>n. X n \<le> Y n) \<U>"
   by (simp only: star_le_def starP2_star_n)
 
-lemma star_n_less: "star_n X < star_n Y = eventually (\<lambda>n. X n < Y n) FreeUltrafilterNat"
+lemma star_n_less: "star_n X < star_n Y = eventually (\<lambda>n. X n < Y n) \<U>"
   by (simp only: star_less_def starP2_star_n)
 
 lemma star_n_zero_num: "0 = star_n (\<lambda>n. 0)"
@@ -199,7 +199,7 @@
 subsection \<open>Existence of Infinite Hyperreal Number\<close>
 
 text \<open>Existence of infinite number not corresponding to any real number.
-  Use assumption that member @{term FreeUltrafilterNat} is not finite.\<close>
+  Use assumption that member @{term \<U>} is not finite.\<close>
 
 text \<open>A few lemmas first.\<close>
 

--- a/src/HOL/Nonstandard_Analysis/HyperNat.thy	Tue Nov 01 00:55:52 2016 +0100
+++ b/src/HOL/Nonstandard_Analysis/HyperNat.thy	Tue Nov 01 01:04:53 2016 +0100
@@ -329,18 +329,18 @@
 subsubsection \<open>Alternative Characterization of @{term HNatInfinite} using Free Ultrafilter\<close>
 
 lemma HNatInfinite_FreeUltrafilterNat:
-  "star_n X \<in> HNatInfinite \<Longrightarrow> \<forall>u. eventually (\<lambda>n. u < X n) FreeUltrafilterNat"
+  "star_n X \<in> HNatInfinite \<Longrightarrow> \<forall>u. eventually (\<lambda>n. u < X n) \<U>"
   apply (auto simp add: HNatInfinite_iff SHNat_eq)
   apply (drule_tac x="star_of u" in spec, simp)
   apply (simp add: star_of_def star_less_def starP2_star_n)
   done
 
 lemma FreeUltrafilterNat_HNatInfinite:
-  "\<forall>u. eventually (\<lambda>n. u < X n) FreeUltrafilterNat \<Longrightarrow> star_n X \<in> HNatInfinite"
+  "\<forall>u. eventually (\<lambda>n. u < X n) \<U> \<Longrightarrow> star_n X \<in> HNatInfinite"
   by (auto simp add: star_less_def starP2_star_n HNatInfinite_iff SHNat_eq hypnat_of_nat_eq)
 
 lemma HNatInfinite_FreeUltrafilterNat_iff:
-  "(star_n X \<in> HNatInfinite) = (\<forall>u. eventually (\<lambda>n. u < X n) FreeUltrafilterNat)"
+  "(star_n X \<in> HNatInfinite) = (\<forall>u. eventually (\<lambda>n. u < X n) \<U>)"
   by (rule iffI [OF HNatInfinite_FreeUltrafilterNat FreeUltrafilterNat_HNatInfinite])
 
 

--- a/src/HOL/Nonstandard_Analysis/NSA.thy	Tue Nov 01 00:55:52 2016 +0100
+++ b/src/HOL/Nonstandard_Analysis/NSA.thy	Tue Nov 01 01:04:53 2016 +0100
@@ -1767,7 +1767,7 @@
 subsubsection \<open>@{term HFinite}\<close>
 
 lemma HFinite_FreeUltrafilterNat:
-  "star_n X \<in> HFinite \<Longrightarrow> \<exists>u. eventually (\<lambda>n. norm (X n) < u) FreeUltrafilterNat"
+  "star_n X \<in> HFinite \<Longrightarrow> \<exists>u. eventually (\<lambda>n. norm (X n) < u) \<U>"
   apply (auto simp add: HFinite_def SReal_def)
   apply (rule_tac x=r in exI)
   apply (simp add: hnorm_def star_of_def starfun_star_n)
@@ -1775,7 +1775,7 @@
   done
 
 lemma FreeUltrafilterNat_HFinite:
-  "\<exists>u. eventually (\<lambda>n. norm (X n) < u) FreeUltrafilterNat \<Longrightarrow> star_n X \<in> HFinite"
+  "\<exists>u. eventually (\<lambda>n. norm (X n) < u) \<U> \<Longrightarrow> star_n X \<in> HFinite"
   apply (auto simp add: HFinite_def mem_Rep_star_iff)
   apply (rule_tac x="star_of u" in bexI)
    apply (simp add: hnorm_def starfun_star_n star_of_def)
@@ -1784,7 +1784,7 @@
   done
 
 lemma HFinite_FreeUltrafilterNat_iff:
-  "star_n X \<in> HFinite \<longleftrightarrow> (\<exists>u. eventually (\<lambda>n. norm (X n) < u) FreeUltrafilterNat)"
+  "star_n X \<in> HFinite \<longleftrightarrow> (\<exists>u. eventually (\<lambda>n. norm (X n) < u) \<U>)"
   by (blast intro!: HFinite_FreeUltrafilterNat FreeUltrafilterNat_HFinite)
 
 
@@ -1804,14 +1804,14 @@
 
 text \<open>Exclude this type of sets from free ultrafilter for Infinite numbers!\<close>
 lemma FreeUltrafilterNat_const_Finite:
-  "eventually (\<lambda>n. norm (X n) = u) FreeUltrafilterNat \<Longrightarrow> star_n X \<in> HFinite"
+  "eventually (\<lambda>n. norm (X n) = u) \<U> \<Longrightarrow> star_n X \<in> HFinite"
   apply (rule FreeUltrafilterNat_HFinite)
   apply (rule_tac x = "u + 1" in exI)
   apply (auto elim: eventually_mono)
   done
 
 lemma HInfinite_FreeUltrafilterNat:
-  "star_n X \<in> HInfinite \<Longrightarrow> \<forall>u. eventually (\<lambda>n. u < norm (X n)) FreeUltrafilterNat"
+  "star_n X \<in> HInfinite \<Longrightarrow> \<forall>u. eventually (\<lambda>n. u < norm (X n)) \<U>"
   apply (drule HInfinite_HFinite_iff [THEN iffD1])
   apply (simp add: HFinite_FreeUltrafilterNat_iff)
   apply (rule allI, drule_tac x="u + 1" in spec)
@@ -1827,7 +1827,7 @@
   by (auto intro: order_less_asym)
 
 lemma FreeUltrafilterNat_HInfinite:
-  "\<forall>u. eventually (\<lambda>n. u < norm (X n)) FreeUltrafilterNat \<Longrightarrow> star_n X \<in> HInfinite"
+  "\<forall>u. eventually (\<lambda>n. u < norm (X n)) \<U> \<Longrightarrow> star_n X \<in> HInfinite"
   apply (rule HInfinite_HFinite_iff [THEN iffD2])
   apply (safe, drule HFinite_FreeUltrafilterNat, safe)
   apply (drule_tac x = u in spec)
@@ -1841,7 +1841,7 @@
 qed
 
 lemma HInfinite_FreeUltrafilterNat_iff:
-  "star_n X \<in> HInfinite \<longleftrightarrow> (\<forall>u. eventually (\<lambda>n. u < norm (X n)) FreeUltrafilterNat)"
+  "star_n X \<in> HInfinite \<longleftrightarrow> (\<forall>u. eventually (\<lambda>n. u < norm (X n)) \<U>)"
   by (blast intro!: HInfinite_FreeUltrafilterNat FreeUltrafilterNat_HInfinite)
 
 
@@ -1904,7 +1904,7 @@
   by (auto simp add: less_Suc_eq)
 
 
-text \<open>Prove that any segment is finite and hence cannot belong to \<open>FreeUltrafilterNat\<close>.\<close>
+text \<open>Prove that any segment is finite and hence cannot belong to \<open>\<U>\<close>.\<close>
 
 lemma finite_real_of_nat_segment: "finite {n::nat. real n < real (m::nat)}"
   by auto
@@ -1925,17 +1925,17 @@
   by (simp add: finite_real_of_nat_le_real)
 
 lemma rabs_real_of_nat_le_real_FreeUltrafilterNat:
-  "\<not> eventually (\<lambda>n. \<bar>real n\<bar> \<le> u) FreeUltrafilterNat"
+  "\<not> eventually (\<lambda>n. \<bar>real n\<bar> \<le> u) \<U>"
   by (blast intro!: FreeUltrafilterNat.finite finite_rabs_real_of_nat_le_real)
 
-lemma FreeUltrafilterNat_nat_gt_real: "eventually (\<lambda>n. u < real n) FreeUltrafilterNat"
+lemma FreeUltrafilterNat_nat_gt_real: "eventually (\<lambda>n. u < real n) \<U>"
   apply (rule FreeUltrafilterNat.finite')
   apply (subgoal_tac "{n::nat. \<not> u < real n} = {n. real n \<le> u}")
    apply (auto simp add: finite_real_of_nat_le_real)
   done
 
 text \<open>The complement of \<open>{n. \<bar>real n\<bar> \<le> u} = {n. u < \<bar>real n\<bar>}\<close> is in
-  \<open>FreeUltrafilterNat\<close> by property of (free) ultrafilters.\<close>
+  \<open>\<U>\<close> by property of (free) ultrafilters.\<close>
 
 lemma Compl_real_le_eq: "- {n::nat. real n \<le> u} = {n. u < real n}"
   by (auto dest!: order_le_less_trans simp add: linorder_not_le)
@@ -1991,17 +1991,17 @@
       simp del: of_nat_Suc)
 
 lemma inverse_real_of_posnat_ge_real_FreeUltrafilterNat:
-  "0 < u \<Longrightarrow> \<not> eventually (\<lambda>n. u \<le> inverse(real(Suc n))) FreeUltrafilterNat"
+  "0 < u \<Longrightarrow> \<not> eventually (\<lambda>n. u \<le> inverse(real(Suc n))) \<U>"
   by (blast intro!: FreeUltrafilterNat.finite finite_inverse_real_of_posnat_ge_real)
 
 text \<open>The complement of \<open>{n. u \<le> inverse(real(Suc n))} = {n. inverse (real (Suc n)) < u}\<close>
-  is in \<open>FreeUltrafilterNat\<close> by property of (free) ultrafilters.\<close>
+  is in \<open>\<U>\<close> by property of (free) ultrafilters.\<close>
 lemma Compl_le_inverse_eq: "- {n. u \<le> inverse(real(Suc n))} = {n. inverse(real(Suc n)) < u}"
   by (auto dest!: order_le_less_trans simp add: linorder_not_le)
 
 
 lemma FreeUltrafilterNat_inverse_real_of_posnat:
-  "0 < u \<Longrightarrow> eventually (\<lambda>n. inverse(real(Suc n)) < u) FreeUltrafilterNat"
+  "0 < u \<Longrightarrow> eventually (\<lambda>n. inverse(real(Suc n)) < u) \<U>"
   by (drule inverse_real_of_posnat_ge_real_FreeUltrafilterNat)
     (simp add: FreeUltrafilterNat.eventually_not_iff not_le[symmetric])
 

--- a/src/HOL/Nonstandard_Analysis/StarDef.thy	Tue Nov 01 00:55:52 2016 +0100
+++ b/src/HOL/Nonstandard_Analysis/StarDef.thy	Tue Nov 01 01:04:53 2016 +0100
@@ -20,7 +20,7 @@
   apply (rule infinite_UNIV_nat)
   done
 
-interpretation FreeUltrafilterNat: freeultrafilter FreeUltrafilterNat
+interpretation FreeUltrafilterNat: freeultrafilter \<U>
   by (rule freeultrafilter_FreeUltrafilterNat)