X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Freduction%2Fdfr_ifr.ma;h=fd5f76b54ba8ff80a7d68ca8f2f9f186112bdba4;hb=d7ff8dcf71f18a17fbf66696f0293cd411c1dbca;hp=b4ccad9d3b781a1e7205f280954219ecacbd1126;hpb=ad6182251b8192ee7d25c53156afbce35e3715b6;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
index b4ccad9d3..fd5f76b54 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/reduction/dfr_ifr.ma
@@ -18,11 +18,9 @@ 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/syntax/path_head_structure.ma".
@@ -35,17 +33,15 @@ include "delayed_updating/syntax/path_depth_reverse.ma".
 (* Main destructions with ifr ***********************************************)
 
 theorem dfr_des_ifr (f) (p) (q) (t1) (t2): t1 ϵ 𝐓 →
-        t1 ➡𝐝𝐟[p,q] t2 → ▼[f]t1 ➡𝐟[⊗p,⊗q] ▼[f]t2.
+        t1 ➡𝐝𝐟[p,q] t2 → ▼[f]t1 ➡𝐢𝐟[⊗p,⊗q] ▼[f]t2.
 #f #p #q #t1 #t2 #H0t1
 * #n * #H1n #Ht1 #Ht2
-@(ex_intro … (↑♭⊗q)) @and3_intro
-[ -H0t1 -H1n -Ht1 -Ht2
-  >list_append_rcons_sn <reverse_append
-  >nsucc_unfold >depth_reverse >depth_L_dx >reverse_lcons
+@(ex_intro … (↑♭q)) @and3_intro
+[ -H0t1 -Ht1 -Ht2
   >structure_L_sn >structure_reverse
-  <path_head_structure //
+  >H1n >path_head_structure_depth <H1n -H1n //
 | lapply (in_comp_unwind2_path_term f … Ht1) -Ht2 -Ht1 -H0t1
-  <unwind2_path_d_dx <depth_structure
+  <unwind2_path_d_dx
   >list_append_rcons_sn in H1n; <reverse_append #H1n
   lapply (unwind2_rmap_append_pap_closed f … H1n)
   <reverse_lcons <depth_L_dx #H2n
@@ -55,9 +51,9 @@ theorem dfr_des_ifr (f) (p) (q) (t1) (t2): t1 ϵ 𝐓 →
   @(subset_eq_trans … (unwind2_term_fsubst …))
   [ @fsubst_eq_repl [ // | // ]
     @(subset_eq_trans … (unwind2_term_iref …))
-    @(subset_eq_canc_sn … (lift_term_eq_repl_dx …))
+    @(subset_eq_canc_sn … (unwind2_term_eq_repl_dx …))
     [ @unwind2_term_grafted_S /2 width=2 by ex_intro/ | skip ] -Ht1
-    @(subset_eq_trans … (unwind2_lift_term_after …))
+    @(subset_eq_trans … (unwind2_term_after …))
     @unwind2_term_eq_repl_sn
 (* Note: crux of the proof begins *)
     @nstream_eq_inv_ext #m
@@ -66,8 +62,8 @@ theorem dfr_des_ifr (f) (p) (q) (t1) (t2): t1 ϵ 𝐓 →
     >list_append_rcons_sn in H1n; <reverse_append #H1n
     lapply (unwind2_rmap_append_pap_closed f … H1n) #H2n
     >nrplus_inj_dx in ⊢ (???%); <H2n -H2n
-    lapply (tls_unwind2_rmap_append_closed f … H1n) #H2n
-    <(tr_pap_eq_repl … H2n) -H2n -H1n //
+    lapply (tls_unwind2_rmap_append_closed f … H1n) -H1n #H2n
+    <(tr_pap_eq_repl … H2n) -H2n //
 (* Note: crux of the proof ends *)
   | //
   | /2 width=2 by ex_intro/