(**************************************************************************)
include "basic_2/syntax/lenv.ma".
-include "apps_2/models/model_push.ma".
+include "apps_2/models/model_vlift.ma".
include "apps_2/notation/models/inwbrackets_4.ma".
(* LOCAL ENVIRONMENT INTERPRETATION ****************************************)
| li_abbr: ∀lv,d,L,V. li M gv L lv → ⟦V⟧[gv, lv] ≗ d → li M gv (L.ⓓV) (⫯[d]lv)
| li_abst: ∀lv,d,L,W. li M gv L lv → li M gv (L.ⓛW) (⫯[d]lv)
| li_unit: ∀lv,d,I,L. li M gv L lv → li M gv (L.ⓤ{I}) (⫯[d]lv)
+| li_repl: ∀lv1,lv2,L. li M gv L lv1 → lv1 ≐ lv2 → li M gv L lv2
.
interpretation "local environment interpretation (model)"
(* Basic inversion lemmas ***************************************************)
fact li_inv_abbr_aux (M) (gv): ∀v,Y. v ϵ ⟦Y⟧{M}[gv] → ∀L,V. Y = L.ⓓV →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⟦V⟧{M}[gv, lv] ≗ d & ⫯{M}[d]lv = v.
-#M #gv #v #Y * -v -Y
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⟦V⟧{M}[gv, lv] ≗ d & ⫯{M}[d]lv ≐ v.
+#M #gv #v #Y #H elim H -v -Y
[ #lv #K #W #H destruct
-| #lv #d #L #V #HL #HV #K #W #H destruct /2 width=5 by ex3_2_intro/
-| #lv #d #L #V #_ #K #W #H destruct
-| #lv #d #I #L #_ #K #W #H destruct
+| #lv #d #L #V #HL #HV #_ #K #W #H destruct /2 width=5 by ex3_2_intro/
+| #lv #d #L #V #_ #_ #K #W #H destruct
+| #lv #d #I #L #_ #_ #K #W #H destruct
+| #lv1 #lv2 #L #_ #Hlv12 #IH #K #W #H destruct
+ elim IH -IH [|*: // ] #lv #d #HK #HW #Hlv
+ /3 width=5 by exteq_trans, ex3_2_intro/
]
qed-.
lemma li_inv_abbr (M) (gv): ∀v,L,V. v ϵ ⟦L.ⓓV⟧{M}[gv] →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⟦V⟧{M}[gv, lv] ≗ d & ⫯{M}[d]lv = v.
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⟦V⟧{M}[gv, lv] ≗ d & ⫯{M}[d]lv ≐ v.
/2 width=3 by li_inv_abbr_aux/ qed-.
fact li_inv_abst_aux (M) (gv): ∀v,Y. v ϵ ⟦Y⟧{M}[gv] → ∀L,W. Y = L.ⓛW →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv = v.
-#M #gv #v #Y * -v -Y
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv ≐ v.
+#M #gv #v #Y #H elim H -v -Y
[ #lv #K #U #H destruct
-| #lv #d #L #V #_ #_ #K #U #H destruct
-| #lv #d #L #V #HL #K #U #H destruct /2 width=4 by ex2_2_intro/
-| #lv #d #I #L #_ #K #U #H destruct
+| #lv #d #L #V #_ #_ #_ #K #U #H destruct
+| #lv #d #L #V #HL #_ #K #U #H destruct /2 width=4 by ex2_2_intro/
+| #lv #d #I #L #_ #_ #K #U #H destruct
+| #lv1 #lv2 #L #_ #Hlv12 #IH #K #U #H destruct
+ elim IH -IH [|*: // ] #lv #d #HK #Hlv
+ /3 width=4 by exteq_trans, ex2_2_intro/
]
qed-.
lemma li_inv_abst (M) (gv): ∀v,L,W. v ϵ ⟦L.ⓛW⟧{M}[gv] →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv = v.
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv ≐ v.
/2 width=4 by li_inv_abst_aux/ qed-.
fact li_inv_unit_aux (M) (gv): ∀v,Y. v ϵ ⟦Y⟧{M}[gv] → ∀I,L. Y = L.ⓤ{I} →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv = v.
-#M #gv #v #Y * -v -Y
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv ≐ v.
+#M #gv #v #Y #H elim H -v -Y
[ #lv #J #K #H destruct
+| #lv #d #L #V #_ #_ #_ #J #K #H destruct
| #lv #d #L #V #_ #_ #J #K #H destruct
-| #lv #d #L #V #_ #J #K #H destruct
-| #lv #d #I #L #HL #J #K #H destruct /2 width=4 by ex2_2_intro/
+| #lv #d #I #L #HL #_ #J #K #H destruct /2 width=4 by ex2_2_intro/
+| #lv1 #lv2 #L #_ #Hlv12 #IH #J #K #H destruct
+ elim IH -IH [|*: // ] #lv #d #HK #Hlv
+ /3 width=4 by exteq_trans, ex2_2_intro/
]
qed-.
lemma li_inv_unit (M) (gv): ∀v,I,L. v ϵ ⟦L.ⓤ{I}⟧{M}[gv] →
- ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv = v.
+ ∃∃lv,d. lv ϵ ⟦L⟧{M}[gv] & ⫯{M}[d]lv ≐ v.
/2 width=4 by li_inv_unit_aux/ qed-.