X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsubstitution%2Flift_eq.ma;h=317e1f4247ef2c6f8526513e1b87eff47cdd54d4;hb=d7ff8dcf71f18a17fbf66696f0293cd411c1dbca;hp=5ab8d7f05a166f99d2679810d119c9b9ecaa8ce2;hpb=3bf7a0b4185dbffe5b822c907956acdbe2d1c559;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_eq.ma b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_eq.ma
index 5ab8d7f05..317e1f424 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_eq.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/substitution/lift_eq.ma
@@ -16,7 +16,10 @@ include "delayed_updating/substitution/lift.ma".
 include "ground/relocation/tr_pap_pap.ma".
 include "ground/relocation/tr_pap_eq.ma".
 include "ground/relocation/tr_pn_eq.ma".
+include "ground/lib/stream_tls_plus.ma".
 include "ground/lib/stream_tls_eq.ma".
+include "ground/arith/nat_plus_rplus.ma".
+include "ground/arith/nat_rplus_pplus.ma".
 
 (* LIFT FOR PATH ************************************************************)
 
@@ -144,7 +147,27 @@ lemma lift_path_S_dx (f) (p):
 #f #p <lift_path_append //
 qed.
 
-(* Advanced inversions ******************************************************)
+(* Advanced constructions with proj_rmap ************************************)
+
+lemma lift_rmap_eq_repl (p):
+      stream_eq_repl … (λf1,f2. ↑[p]f1 ≗ ↑[p]f2).
+#p elim p -p //
+* [ #n ] #p #IH #f1 #f2 #Hf
+[ /3 width=1 by stream_tls_eq_repl/
+| /2 width=1 by/
+| /3 width=1 by tr_push_eq_repl/
+| /2 width=1 by/
+| /2 width=1 by/
+]
+qed.
+
+lemma tls_lift_rmap_d_dx (f) (p) (m) (n):
+      ⇂*[m+n]↑[p]f ≗ ⇂*[m]↑[p◖𝗱n]f.
+#f #p #m #n
+<lift_rmap_d_dx >nrplus_inj_dx >nrplus_inj_sn //
+qed.
+
+(* Advanced inversions with proj_path ***************************************)
 
 lemma lift_path_inv_empty (f) (p):
       (𝐞) = ↑[f]p → 𝐞 = p.
@@ -227,7 +250,7 @@ lemma lift_path_inv_S_sn (f) (p) (q):
 /2 width=3 by ex2_intro/
 qed-.
 
-lemma lift_path_inv_append_dx (q2) (q1) (p) (f):
+lemma lift_path_inv_append_sn (q2) (q1) (p) (f):
       q1●q2 = ↑[f]p →
       ∃∃p1,p2. q1 = ↑[f]p1 & q2 = ↑[↑[p1]f]p2 & p1●p2 = p.
 #q2 #q1 elim q1 -q1
@@ -235,27 +258,29 @@ lemma lift_path_inv_append_dx (q2) (q1) (p) (f):
 [ <list_append_empty_sn #H0 destruct
   /2 width=5 by ex3_2_intro/
 | <list_append_lcons_sn #H0
-  elim (lift_path_inv_d_sn … H0) -H0 #r1 #m1 #_ #_ #H0 #_ -IH
-    elim (eq_inv_list_empty_append … H0) -H0 #_ #H0 destruct
-    elim Hq2 -Hq2 //
-  | elim (lift_path_inv_m_sn … H)
-  | elim (lift_path_inv_L_sn … H) -H #r1 #s1 #Hr1 #Hs1 #H0 destruct
-    elim (IH … Hs1) -IH -Hs1 // -Hq2 #p1 #p2 #H1 #H2 #H3 destruct
-    @(ex3_2_intro … (r1●𝗟◗p1)) //
-    <structure_append <Hr1 -Hr1 //
-  | elim (lift_path_inv_A_sn … H) -H #r1 #s1 #Hr1 #Hs1 #H0 destruct
-    elim (IH … Hs1) -IH -Hs1 // -Hq2 #p1 #p2 #H1 #H2 #H3 destruct
-    @(ex3_2_intro … (r1●𝗔◗p1)) //
-    <structure_append <Hr1 -Hr1 //
-  | elim (lift_path_inv_S_sn … H) -H #r1 #s1 #Hr1 #Hs1 #H0 destruct
-    elim (IH … Hs1) -IH -Hs1 // -Hq2 #p1 #p2 #H1 #H2 #H3 destruct
-    @(ex3_2_intro … (r1●𝗦◗p1)) //
-    <structure_append <Hr1 -Hr1 //
-  ]
+  elim (lift_path_inv_d_sn … H0) -H0 #r1 #m1 #H1 #H0 #H2 destruct
+  elim (IH … H0) -IH -H0 #p1 #p2 #H1 #H2 #H3 destruct
+  /2 width=5 by ex3_2_intro/
+| <list_append_lcons_sn #H0
+  elim (lift_path_inv_m_sn … H0) -H0 #r1 #H0 #H1 destruct
+  elim (IH … H0) -IH -H0 #p1 #p2 #H1 #H2 #H3 destruct
+  /2 width=5 by ex3_2_intro/
+| <list_append_lcons_sn #H0
+  elim (lift_path_inv_L_sn … H0) -H0 #r1 #H0 #H1 destruct
+  elim (IH … H0) -IH -H0 #p1 #p2 #H1 #H2 #H3 destruct
+  /2 width=5 by ex3_2_intro/
+| <list_append_lcons_sn #H0
+  elim (lift_path_inv_A_sn … H0) -H0 #r1 #H0 #H1 destruct
+  elim (IH … H0) -IH -H0 #p1 #p2 #H1 #H2 #H3 destruct
+  /2 width=5 by ex3_2_intro/
+| <list_append_lcons_sn #H0
+  elim (lift_path_inv_S_sn … H0) -H0 #r1 #H0 #H1 destruct
+  elim (IH … H0) -IH -H0 #p1 #p2 #H1 #H2 #H3 destruct
+  /2 width=5 by ex3_2_intro/
 ]
 qed-.
 
-(* Main inversions **********************************************************)
+(* Main inversions with proj_path *******************************************)
 
 theorem lift_path_inj (q:path) (p) (f):
         ↑[f]q = ↑[f]p → q = p.
@@ -264,7 +289,7 @@ theorem lift_path_inj (q:path) (p) (f):
   <(lift_path_inv_empty … H0) -H0 //
 | <lift_path_d_sn #H0
   elim (lift_path_inv_d_sn … H0) -H0 #r #h #H0
-  <(tr_pap_inj ????? H0) -h [1,3: // ] #Hr #H0 destruct
+  >(tr_pap_inj ???? H0) -k [1,3: // ] #Hr #H0 destruct
 | <lift_path_m_sn #H0
   elim (lift_path_inv_m_sn … H0) -H0 #r #Hr #H0 destruct
 | <lift_path_L_sn #H0
@@ -277,15 +302,3 @@ theorem lift_path_inj (q:path) (p) (f):
 <(IH … Hr) -r -IH //
 qed-.
 
-(* COMMENT 
-
-(* Advanced constructions with proj_rmap and stream_tls *********************)
-
-lemma lift_rmap_tls_d_dx (f) (p) (m) (n):
-      ⇂*[m+n]↑[p]f ≗ ⇂*[m]↑[p◖𝗱n]f.
-#f #p #m #n
-<lift_rmap_d_dx >nrplus_inj_dx
-/2 width=1 by tr_tls_compose_uni_dx/
-qed.
-
-*)