# HG changeset patch
# User Cezary Kaliszyk <kaliszyk@in.tum.de>
# Date 1307494599 -32400
# Node ID 297cff1d10483db3ac3c7d40cebb7d95a1ee6f5e
# Parent  0acb0b8f4106e9fc282075efdb9388b8ac481188
FCB for res binding and simplified proof of subst for type schemes

diff -r 0acb0b8f4106 -r 297cff1d1048 Nominal/Ex/TypeSchemes.thy
--- a/Nominal/Ex/TypeSchemes.thy	Wed Jun 08 07:06:20 2011 +0900
+++ b/Nominal/Ex/TypeSchemes.thy	Wed Jun 08 09:56:39 2011 +0900
@@ -347,7 +347,6 @@
   apply (rule, perm_simp, rule)
   apply(rule TrueI)
   apply(case_tac x)
-  apply(simp)
   apply(rule_tac y="b" in ty2.exhaust)
   apply(blast)
   apply(blast)
@@ -355,15 +354,11 @@
   done
 
 termination
-  apply(relation "measure (size o snd)")
-  apply(simp_all add: ty2.size)
-  done
+  by (relation "measure (size o snd)") (simp_all add: ty2.size)
 
 lemma subst_eqvt[eqvt]:
   shows "(p \<bullet> subst \<theta> T) = subst (p \<bullet> \<theta>) (p \<bullet> T)"
-apply(induct \<theta> T rule: subst.induct)
-apply(simp_all add: lookup2_eqvt)
-done
+  by (induct \<theta> T rule: subst.induct) (simp_all add: lookup2_eqvt)
 
 lemma supp_fun_app2_eqvt:
   assumes e: "eqvt f"
@@ -379,7 +374,37 @@
 lemma fresh_star_inter1:
   "xs \<sharp>* z \<Longrightarrow> (xs \<inter> ys) \<sharp>* z"
   unfolding fresh_star_def by blast
- 
+
+lemma Abs_res_fcb:
+  fixes xs ys :: "('a :: at_base) set"
+    and S T :: "'b :: fs"
+  assumes e: "(Abs_res (atom ` xs) T) = (Abs_res (atom ` ys) S)"
+    and f1: "\<And>x. x \<in> atom ` xs \<Longrightarrow> x \<in> supp T \<Longrightarrow> x \<sharp> f xs T"
+    and f2: "\<And>x. supp T - atom ` xs \<inter> supp T = supp S - atom ` ys \<inter> supp S \<Longrightarrow> x \<in> atom ` ys \<Longrightarrow> x \<in> supp S \<Longrightarrow> x \<sharp> f xs T"
+    and eqv: "\<And>p. p \<bullet> T = S \<Longrightarrow> supp p \<subseteq> atom ` xs \<inter> supp T \<union> atom ` ys \<inter> supp S
+               \<Longrightarrow> p \<bullet> (atom ` xs \<inter> supp T) = atom ` ys \<inter> supp S
+ \<Longrightarrow> p \<bullet> (f xs T) = f ys S"
+  shows "f xs T = f ys S"
+  using e apply -
+  apply (subst (asm) Abs_eq_res_set)
+  apply (subst (asm) Abs_eq_iff2)
+  apply (simp add: alphas)
+  apply (elim exE conjE)
+  apply(rule trans)
+  apply (rule_tac p="p" in supp_perm_eq[symmetric])
+  apply(rule fresh_star_supp_conv)
+  apply(drule fresh_star_perm_set_conv)
+  apply (rule finite_Diff)
+  apply (rule finite_supp)
+  apply (subgoal_tac "(atom ` xs \<inter> supp T \<union> atom ` ys \<inter> supp S) \<sharp>* f xs T")
+  apply (metis Un_absorb2 fresh_star_Un)
+  apply (subst fresh_star_Un)
+  apply (rule conjI)
+  apply (simp add: fresh_star_def f1)
+  apply (simp add: fresh_star_def f2)
+  apply (simp add: eqv)
+  done
+
 nominal_primrec
   substs :: "(name \<times> ty2) list \<Rightarrow> tys2 \<Rightarrow> tys2"
 where
@@ -389,33 +414,17 @@
   apply auto[2]
   apply (rule_tac y="b" and c="a" in tys2.strong_exhaust)
   apply auto
-  apply (subst (asm) Abs_eq_res_set)
-  apply (subst (asm) Abs_eq_iff2)
-  apply (clarify)
-  apply (simp add: alphas)
-  apply (clarify)
-  apply (rule trans)
-  apply(rule_tac p="p" in supp_perm_eq[symmetric])
-  apply(rule fresh_star_supp_conv)
-  apply(drule fresh_star_perm_set_conv)
-  apply (rule finite_Diff)
-  apply (rule finite_supp)
-  apply (subgoal_tac "(atom ` fset xs \<inter> supp t \<union> atom ` fset xsa \<inter> supp (p \<bullet> t)) \<sharp>* ([atom ` fset xs]res. subst \<theta>' t)")
-  apply (metis Un_absorb2 fresh_star_Un)
-  apply (subst fresh_star_Un)
-  apply (rule conjI)
-  apply (simp (no_asm) add: fresh_star_def)
-  apply (rule)
+  apply (erule Abs_res_fcb)
+  apply (simp add: Abs_fresh_iff)
   apply (simp add: Abs_fresh_iff)
-  apply (simp add: fresh_star_def)
-  apply (rule)
-  apply (simp (no_asm) add: Abs_fresh_iff)
   apply auto[1]
-  apply (simp add: fresh_def supp_Abs)
+  apply (simp add: fresh_def fresh_star_def)
   apply (rule contra_subsetD)
   apply (rule supp_subst)
-  apply auto[1]
   apply simp
+  apply blast
+  apply (simp add: subst_eqvt)
+  apply clarify
   apply (subst Abs_eq_iff)
   apply (rule_tac x="0::perm" in exI)
   apply (subgoal_tac "p \<bullet> subst \<theta>' t = subst \<theta>' (p \<bullet> t)")
@@ -428,19 +437,20 @@
   apply (metis Diff_partition fresh_star_Un)
   apply (simp add: fresh_star_Un fresh_star_inter1)
   apply (simp add: alphas fresh_star_zero)
+  apply (simp add: subst_eqvt)
   apply auto[1]
   apply (subgoal_tac "atom xa \<in> p \<bullet> (atom ` fset xs \<inter> supp t)")
   apply (simp add: inter_eqvt)
   apply blast
   apply (subgoal_tac "atom xa \<in> supp(p \<bullet> t)")
-  apply (simp add: IntI image_eqI)
+  apply (auto simp add: IntI image_eqI)
   apply (drule subsetD[OF supp_subst])
   apply (simp add: fresh_star_def fresh_def)
   apply (subgoal_tac "x \<in> p \<bullet> (atom ` fset xs \<inter> supp t)")
   apply (simp add: )
   apply (subgoal_tac "x \<in> supp(p \<bullet> t)")
   apply (metis inf1I inter_eqvt mem_def supp_eqvt )
-  apply (rotate_tac 6)
+  apply (rotate_tac 4)
   apply (drule sym)
   apply (simp add: subst_eqvt)
   apply (drule subsetD[OF supp_subst])