include "delayed_updating/reduction/dfr.ma".
include "delayed_updating/reduction/ifr.ma".
-include "delayed_updating/substitution/fsubst_lift.ma".
+include "delayed_updating/unwind1/unwind_fsubst.ma".
+include "delayed_updating/unwind1/unwind_constructors.ma".
+include "delayed_updating/unwind1/unwind_preterm_eq.ma".
+include "delayed_updating/unwind1/unwind_structure_depth.ma".
+include "delayed_updating/unwind1/unwind_depth.ma".
include "delayed_updating/substitution/fsubst_eq.ma".
-include "delayed_updating/substitution/lift_constructors.ma".
-include "delayed_updating/substitution/lift_preterm_eq.ma".
-include "delayed_updating/substitution/lift_structure_depth.ma".
include "delayed_updating/syntax/prototerm_proper_constructors.ma".
include "delayed_updating/syntax/path_structure_depth.ma".
include "ground/relocation/tr_uni_compose.ma".
include "ground/relocation/tr_pap_pushs.ma".
-include "ground/lib/stream_eq_eq.ma".
-
(* DELAYED FOCUSED REDUCTION ************************************************)
-lemma dfr_lift_bi (f) (p) (q) (t1) (t2): t1 ϵ 𝐓 →
- t1 ➡𝐝𝐟[p,q] t2 → ↑[f]t1 ➡𝐟[⊗p,⊗q] ↑[f]t2.
-#f #p #q #t1 #t2 #H0t1
-* #b #n * #Hb #Hn #Ht1 #Ht2
+(* COMMENT
+axiom pippo (b) (q) (n):
+ ↑❘q❘ = (↑[q]𝐢)@❨n❩ →
+ ↑❘q❘+❘b❘= (↑[b●𝗟◗q]𝐢)@❨n+❘b❘❩.
+
+lemma unwind_rmap_tls_eq_id (p) (n):
+ ❘p❘ = ↑[p]𝐢@❨n❩ →
+ (𝐢) ≗ ⇂*[n]↑[p]𝐢.
+#p @(list_ind_rcons … p) -p
+[ #n <depth_empty #H destruct
+| #p * [ #m ] #IH #n
+ [ <depth_d_dx <unwind_rmap_pap_d_dx #H0
+ @(stream_eq_trans … (unwind_rmap_tls_d_dx …))
+ @(stream_eq_trans … (IH …)) -IH //
+ | /2 width=1 by/
+ | <depth_L_dx <unwind_rmap_L_dx
+ cases n -n [| #n ] #H0
+ [
+ |
+ ]
+ | /2 width=1 by/
+ | /2 width=1 by/
+ ]
+]
+
+
+(* (↑❘q❘+❘b❘=↑[b●𝗟◗q]𝐢@❨n+❘b❘❩ *)
+(* [↑[p]𝐢@❨n❩]⫯*[❘p❘]f∘⇂*[n]↑[p]𝐢) *)
+lemma unwind_rmap_tls_eq (f) (p) (n):
+ ❘p❘ = ↑[p]𝐢@❨n❩ →
+ f ≗ ⇂*[n]↑[p]f.
+#f #p #n #Hp
+@(stream_eq_canc_dx … (stream_tls_eq_repl …))
+[| @unwind_rmap_decompose | skip ]
+<tr_compose_tls <Hp
+
+@(stream_eq_canc_dx) … (unwind_rmap_decompose …))
+
+*)
+lemma dfr_unwind_id_bi (p) (q) (t1) (t2): t1 ϵ 𝐓 →
+ t1 ➡𝐝𝐟[p,q] t2 → ▼[𝐢]t1 ➡𝐟[⊗p,⊗q] ▼[𝐢]t2.
+#p #q #t1 #t2 #H0t1
+* #b #n * #Hb #Hn #Ht1 #Ht2
@(ex1_2_intro … (⊗b) (↑❘⊗q❘)) @and4_intro
[ //
-| #g <lift_rmap_structure <depth_structure
- >tr_pushs_swap <tr_pap_pushs_le //
-| lapply (in_comp_lift_bi f … Ht1) -Ht1 -H0t1 -Hb -Ht2
- <lift_path_d_empty_dx //
-| lapply (lift_term_eq_repl_dx f … Ht2) -Ht2 #Ht2
+| //
+| lapply (in_comp_unwind_bi (𝐢) … Ht1) -Ht1 -H0t1 -Hb -Ht2
+ <unwind_path_d_empty_dx <depth_structure //
+| lapply (unwind_term_eq_repl_dx (𝐢) … Ht2) -Ht2 #Ht2
@(subset_eq_trans … Ht2) -t2
- @(subset_eq_trans … (lift_fsubst …))
- [ <lift_rmap_append <lift_rmap_A_sn <lift_rmap_append <lift_rmap_L_sn
+ @(subset_eq_trans … (unwind_fsubst …))
+ [ (*<unwind_rmap_append <unwind_rmap_A_sn <unwind_rmap_append <unwind_rmap_L_sn *)
<structure_append <structure_A_sn <structure_append <structure_L_sn
<depth_append <depth_L_sn <depth_structure <depth_structure
@fsubst_eq_repl [ // ]
- @(subset_eq_trans … (lift_iref …))
- @(subset_eq_canc_sn … (lift_term_eq_repl_dx …))
- [ @lift_grafted_S /2 width=2 by ex_intro/ | skip ]
- @(subset_eq_trans … (lift_term_after …))
- @(subset_eq_canc_dx … (lift_term_after …))
- @lift_term_eq_repl_sn -t1
+ @(subset_eq_trans … (unwind_iref …))
+(*
+ @(subset_eq_canc_sn … (unwind_term_eq_repl_dx …))
+ [ @unwind_grafted_S /2 width=2 by ex_intro/ | skip ]
+
+ @(subset_eq_trans … (unwind_term_after …))
+ @(subset_eq_canc_dx … (unwind_term_after …))
+ @unwind_term_eq_repl_sn -t1
@(stream_eq_trans … (tr_compose_uni_dx …))
+ lapply (Hn (𝐢)) -Hn >tr_id_unfold #Hn
+ lapply (pippo … b … Hn) -Hn #Hn
@tr_compose_eq_repl
-(*
- >nrplus_inj_dx <tr_pap_plus
-*)
+ [ <unwind_rmap_pap_le //
+ <Hn <nrplus_inj_sn //
+ |
+ ]
+*)
| //
| /2 width=2 by ex_intro/
| //
]
]
+
+(*
+Hn : ↑❘q❘ = ↑[p●𝗔◗b●𝗟◗q]𝐢@❨n❩
+---------------------------
+↑[𝐮❨↑❘q❘+❘b❘❩] ↑[↑[p]𝐢] t ⇔ ↑[𝐮❨↑[p●𝗔◗b●𝗟◗q]𝐢@❨n+❘b❘❩❩] t
+*)