(**************************************************************************)
include "delayed_updating/reduction/dfr.ma".
-include "delayed_updating/reduction/ifr.ma".
-(*
-include "delayed_updating/unwind/unwind2_constructors.ma".
-include "delayed_updating/unwind/unwind2_preterm_fsubst.ma".
-include "delayed_updating/unwind/unwind2_preterm_eq.ma".
-include "delayed_updating/unwind/unwind2_prototerm_lift.ma".
-include "delayed_updating/unwind/unwind2_rmap_head.ma".
-*)
-include "delayed_updating/substitution/fsubst_eq.ma".
-include "delayed_updating/substitution/lift_prototerm_eq.ma".
-include "delayed_updating/syntax/prototerm_proper_constructors.ma".
+include "delayed_updating/substitution/fsubst_lift.ma".
+include "delayed_updating/substitution/fsubst_eq.ma".
+include "delayed_updating/substitution/lift_constructors.ma".
+include "delayed_updating/substitution/lift_path_head.ma".
+include "delayed_updating/substitution/lift_rmap_head.ma".
(* DELAYED FOCUSED REDUCTION ************************************************)
(* Constructions with lift **************************************************)
-theorem dfr_lift_bi (f) (p) (q) (t1) (t2): (*t1 Ļµ š ā *)
- t1 ā”šš[p,q] t2 ā ā[f]t1 ā”š[ā[f]p,ā[ā[pāšāš]f]q] ā[f]t2.
+theorem dfr_lift_bi (f) (p) (q) (t1) (t2):
+ t1 Ć¢\9eĀ”Ć°\9d\90\9dĆ°\9d\90\9f[p,q] t2 Ć¢\86\92 Ć¢\86\91[f]t1 Ć¢\9eĀ”Ć°\9d\90\9dĆ°\9d\90\9f[Ć¢\86\91[f]p,Ć¢\86\91[Ć¢\86\91[pĆ¢\97\96Ć°\9d\97\94Ć¢\97\96Ć°\9d\97\9f]f]q] Ć¢\86\91[f]t2.
#f #p #q #t1 #t2
* #n * #H1n #Ht1 #Ht2
@(ex_intro ā¦ ((ā[pāšāšāq]f)ļ¼ ā§£āØnā©)) @and3_intro
[ -Ht1 -Ht2
- >H1n >path_head_structure_depth <H1n -H1n //
-| lapply (in_comp_unwind2_path_term f ā¦ Ht1) -Ht2 -Ht1 -H0t1
- <unwind2_path_d_dx <depth_structure
+ <lift_rmap_L_dx >lift_path_L_sn
>list_append_rcons_sn in H1n; <reverse_append #H1n
- lapply (unwind2_rmap_append_pap_closed f ā¦ H1n)
- <reverse_lcons <depth_L_dx #H2n
- lapply (eq_inv_ninj_bi ā¦ H2n) -H2n #H2n <H2n -H2n -H1n #Ht1 //
-| lapply (unwind2_term_eq_repl_dx f ā¦ Ht2) -Ht2 #Ht2
+ <(lift_path_head ā¦ H1n) -H1n //
+| lapply (in_comp_lift_path_term f ā¦ Ht1) -Ht2 -Ht1 -H1n
+ <lift_path_d_dx #Ht1 //
+| lapply (lift_term_eq_repl_dx f ā¦ Ht2) -Ht2 #Ht2 -Ht1
@(subset_eq_trans ā¦ Ht2) -t2
- @(subset_eq_trans ā¦ (unwind2_term_fsubst ā¦))
- [ @fsubst_eq_repl [ // | // ]
- @(subset_eq_trans ā¦ (unwind2_term_iref ā¦))
- @(subset_eq_canc_sn ā¦ (lift_term_eq_repl_dx ā¦))
- [ @unwind2_term_grafted_S /2 width=2 by ex_intro/ | skip ] -Ht1
- @(subset_eq_trans ā¦ (unwind2_lift_term_after ā¦))
- @unwind2_term_eq_repl_sn
+ @(subset_eq_trans ā¦ (lift_term_fsubst ā¦))
+ @fsubst_eq_repl [ // | // ]
+ @(subset_eq_trans ā¦ (lift_term_iref ā¦))
+ @iref_eq_repl
+ @(subset_eq_canc_sn ā¦ (lift_term_grafted_S ā¦))
+ @lift_term_eq_repl_sn
(* Note: crux of the proof begins *)
- @nstream_eq_inv_ext #m
- <tr_compose_pap <tr_compose_pap
- <tr_uni_pap <tr_uni_pap <tr_pap_plus
- >list_append_rcons_sn in H1n; <reverse_append #H1n
- lapply (unwind2_rmap_append_pap_closed f ā¦ H1n) #H2n
- >nrplus_inj_dx in ā¢ (???%); <H2n -H2n
- lapply (tls_unwind2_rmap_append_closed f ā¦ H1n) #H2n
- <(tr_pap_eq_repl ā¦ H2n) -H2n -H1n //
+ >list_append_rcons_sn in H1n; #H1n >lift_rmap_A_dx
+ /2 width=1 by tls_lift_rmap_append_closed/
(* Note: crux of the proof ends *)
- | //
- | /2 width=2 by ex_intro/
- | //
- ]
]
qed.