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/unwind/unwind2_rmap_closed.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/syntax/path_head_structure.ma".
+include "delayed_updating/syntax/path_closed_structure.ma".
include "delayed_updating/syntax/path_structure_depth.ma".
(* DELAYED BALANCED FOCUSED REDUCTION ***************************************)
theorem dbfr_des_ibfr (f) (t1) (t2) (r): t1 Ļµ š ā
t1 ā”ššš[r] t2 ā ā¼[f]t1 ā”š¢šš[ār] ā¼[f]t2.
#f #t1 #t2 #r #H0t1
-* #p #b #q #h #k #Hr #Hb #Hh #H1k #Ht1 #Ht2 destruct
-@(ex6_5_intro ā¦ (āp) (āb) (āq) (āb) (āāq))
-[ -H0t1 -Hb -Hh -H1k -Ht1 -Ht2 //
-| -H0t1 -Hh -H1k -Ht1 -Ht2 //
-| -H0t1 -Hb -Ht1 -H1k -Ht2
- >Hh in ā¢ (??%?); >path_head_structure_depth <Hh -Hh //
-| -H0t1 -Hb -Hh -Ht1 -Ht2
- >structure_L_sn
- >H1k in ā¢ (??%?); >path_head_structure_depth <H1k -H1k //
-| lapply (in_comp_unwind2_path_term f ā¦ Ht1) -Ht2 -Ht1 -H0t1 -Hb -Hh
- <unwind2_path_d_dx >list_append_rcons_dx >list_append_assoc
- lapply (unwind2_rmap_append_pap_closed f ā¦ (pāšāb) ā¦ H1k) -H1k
- <depth_L_sn #H2k
- lapply (eq_inv_ninj_bi ā¦ H2k) -H2k #H2k <H2k -H2k #Ht1 //
+* #p #b #q #m #n #Hr #Hb #Hm #Hn #Ht1 #Ht2 destruct
+@(ex6_5_intro ā¦ (āp) (āb) (āq) (āb) (āq))
+[ -H0t1 -Hb -Hm -Hn -Ht1 -Ht2 //
+| -H0t1 -Hm -Hn -Ht1 -Ht2 //
+| -H0t1 -Hb -Hn -Ht1 -Ht2
+ /2 width=2 by path_closed_structure_depth/
+| -H0t1 -Hb -Hm -Ht1 -Ht2
+ /2 width=2 by path_closed_structure_depth/
+| lapply (in_comp_unwind2_path_term f ā¦ Ht1) -H0t1 -Hb -Hm -Ht2 -Ht1
+ <unwind2_path_d_dx <tr_pap_succ_nap >list_append_rcons_dx >list_append_assoc
+ <nap_unwind2_rmap_append_closed_Lq_dx_depth //
| lapply (unwind2_term_eq_repl_dx f ā¦ Ht2) -Ht2 #Ht2
- lapply (path_head_refl_append_bi ā¦ Hh H1k) -Hh -H1k <nrplus_inj_sn #H1k
@(subset_eq_trans ā¦ Ht2) -t2
@(subset_eq_trans ā¦ (unwind2_term_fsubst_ppc ā¦))
[ @fsubst_eq_repl [ // | // ]
@unwind2_term_eq_repl_sn
(* Note: crux of the proof begins *)
<list_append_rcons_sn
- @(stream_eq_trans ā¦ (tr_compose_uni_dx ā¦))
+ @(stream_eq_trans ā¦ (tr_compose_uni_dx_pap ā¦)) <tr_pap_succ_nap
@tr_compose_eq_repl
- [ <unwind2_rmap_append_pap_closed //
- <depth_append <depth_L_sn
- <nplus_comm <nrplus_npsucc_sn <nplus_succ_sn //
+ [ <nap_plus_unwind2_rmap_append_closed_bLq_dx_depth //
| >unwind2_rmap_A_dx
- /2 width=1 by tls_unwind2_rmap_closed/
+ /2 width=2 by tls_succ_plus_unwind2_rmap_append_closed_bLq_dx/
]
(* Note: crux of the proof ends *)
| //