(* *)
(**************************************************************************)
-include "basic_2/notation/relations/lazyeq_3.ma".
+include "basic_2/notation/relations/ideqsn_3.ma".
+include "basic_2/syntax/ceq_ext.ma".
include "basic_2/relocation/lexs.ma".
(* RANGED EQUIVALENCE FOR LOCAL ENVIRONMENTS ********************************)
(* Basic_2A1: includes: lreq_atom lreq_zero lreq_pair lreq_succ *)
-definition lreq: relation3 rtmap lenv lenv ≝ lexs ceq cfull.
+definition lreq: relation3 rtmap lenv lenv ≝ lexs ceq_ext cfull.
interpretation
"ranged equivalence (local environment)"
- 'LazyEq f L1 L2 = (lreq f L1 L2).
+ 'IdEqSn f L1 L2 = (lreq f L1 L2).
(* Basic properties *********************************************************)
(* Basic_2A1: includes: lreq_sym *)
lemma lreq_sym: ∀f. symmetric … (lreq f).
-#f #L1 #L2 #H elim H -L1 -L2 -f
-/2 width=1 by lexs_next, lexs_push/
-qed-.
+/3 width=2 by lexs_sym, cext2_sym/ qed-.
(* Basic inversion lemmas ***************************************************)
/2 width=4 by lexs_inv_atom1/ qed-.
(* Basic_2A1: includes: lreq_inv_pair1 *)
-lemma lreq_inv_next1: ∀g,J,K1,Y,W1. K1.ⓑ{J}W1 ≡[⫯g] Y →
- ∃∃K2. K1 ≡[g] K2 & Y = K2.ⓑ{J}W1.
-#g #J #K1 #Y #W1 #H elim (lexs_inv_next1 … H) -H /2 width=3 by ex2_intro/
+lemma lreq_inv_next1: ∀g,J,K1,Y. K1.ⓘ{J} ≡[↑g] Y →
+ ∃∃K2. K1 ≡[g] K2 & Y = K2.ⓘ{J}.
+#g #J #K1 #Y #H
+elim (lexs_inv_next1 … H) -H #Z #K2 #HK12 #H1 #H2 destruct
+<(ceq_ext_inv_eq … H1) -Z /2 width=3 by ex2_intro/
qed-.
(* Basic_2A1: includes: lreq_inv_zero1 lreq_inv_succ1 *)
-lemma lreq_inv_push1: ∀g,J,K1,Y,W1. K1.ⓑ{J}W1 ≡[↑g] Y →
- ∃∃K2,W2. K1 ≡[g] K2 & Y = K2.ⓑ{J}W2.
-#g #J #K1 #Y #W1 #H elim (lexs_inv_push1 … H) -H /2 width=4 by ex2_2_intro/ qed-.
+lemma lreq_inv_push1: ∀g,J1,K1,Y. K1.ⓘ{J1} ≡[⫯g] Y →
+ ∃∃J2,K2. K1 ≡[g] K2 & Y = K2.ⓘ{J2}.
+#g #J1 #K1 #Y #H elim (lexs_inv_push1 … H) -H /2 width=4 by ex2_2_intro/
+qed-.
(* Basic_2A1: includes: lreq_inv_atom2 *)
lemma lreq_inv_atom2: ∀f,X. X ≡[f] ⋆ → X = ⋆.
/2 width=4 by lexs_inv_atom2/ qed-.
(* Basic_2A1: includes: lreq_inv_pair2 *)
-lemma lreq_inv_next2: ∀g,J,X,K2,W2. X ≡[⫯g] K2.ⓑ{J}W2 →
- ∃∃K1. K1 ≡[g] K2 & X = K1.ⓑ{J}W2.
-#g #J #X #K2 #W2 #H elim (lexs_inv_next2 … H) -H /2 width=3 by ex2_intro/ qed-.
+lemma lreq_inv_next2: ∀g,J,X,K2. X ≡[↑g] K2.ⓘ{J} →
+ ∃∃K1. K1 ≡[g] K2 & X = K1.ⓘ{J}.
+#g #J #X #K2 #H
+elim (lexs_inv_next2 … H) -H #Z #K1 #HK12 #H1 #H2 destruct
+<(ceq_ext_inv_eq … H1) -J /2 width=3 by ex2_intro/
+qed-.
(* Basic_2A1: includes: lreq_inv_zero2 lreq_inv_succ2 *)
-lemma lreq_inv_push2: ∀g,J,X,K2,W2. X ≡[↑g] K2.ⓑ{J}W2 →
- ∃∃K1,W1. K1 ≡[g] K2 & X = K1.ⓑ{J}W1.
-#g #J #X #K2 #W2 #H elim (lexs_inv_push2 … H) -H /2 width=4 by ex2_2_intro/ qed-.
+lemma lreq_inv_push2: ∀g,J2,X,K2. X ≡[⫯g] K2.ⓘ{J2} →
+ ∃∃J1,K1. K1 ≡[g] K2 & X = K1.ⓘ{J1}.
+#g #J2 #X #K2 #H elim (lexs_inv_push2 … H) -H /2 width=4 by ex2_2_intro/
+qed-.
(* Basic_2A1: includes: lreq_inv_pair *)
-lemma lreq_inv_next: ∀f,I1,I2,L1,L2,V1,V2.
- L1.ⓑ{I1}V1 ≡[⫯f] (L2.ⓑ{I2}V2) →
- ∧∧ L1 ≡[f] L2 & V1 = V2 & I1 = I2.
-/2 width=1 by lexs_inv_next/ qed-.
+lemma lreq_inv_next: ∀f,I1,I2,L1,L2. L1.ⓘ{I1} ≡[↑f] L2.ⓘ{I2} →
+ L1 ≡[f] L2 ∧ I1 = I2.
+#f #I1 #I2 #L1 #L2 #H elim (lexs_inv_next … H) -H
+/3 width=3 by ceq_ext_inv_eq, conj/
+qed-.
(* Basic_2A1: includes: lreq_inv_succ *)
-lemma lreq_inv_push: ∀f,I1,I2,L1,L2,V1,V2.
- L1.ⓑ{I1}V1 ≡[↑f] (L2.ⓑ{I2}V2) →
- L1 ≡[f] L2 ∧ I1 = I2.
-#f #I1 #I2 #L1 #L2 #V1 #V2 #H elim (lexs_inv_push … H) -H /2 width=1 by conj/
+lemma lreq_inv_push: ∀f,I1,I2,L1,L2. L1.ⓘ{I1} ≡[⫯f] L2.ⓘ{I2} → L1 ≡[f] L2.
+#f #I1 #I2 #L1 #L2 #H elim (lexs_inv_push … H) -H /2 width=1 by conj/
qed-.
-lemma lreq_inv_tl: ∀f,I,L1,L2,V. L1 ≡[⫱f] L2 → L1.ⓑ{I}V ≡[f] L2.ⓑ{I}V.
+lemma lreq_inv_tl: ∀f,I,L1,L2. L1 ≡[⫱f] L2 → L1.ⓘ{I} ≡[f] L2.ⓘ{I}.
/2 width=1 by lexs_inv_tl/ qed-.
(* Basic_2A1: removed theorems 5: