X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Funwind%2Funwind2_rmap_closed.ma;h=0afdb349d8d324d103ebc3d0ff61d91f099c239d;hp=9dbc9ec5063b87fb05427fcc7d87d1b238429b21;hb=7008128d354c6e998a87bc2febe9f86ea714869c;hpb=d06053844638d88936d711b66fddbcca2a9add1c

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_closed.ma b/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_closed.ma
index 9dbc9ec50..0afdb349d 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_closed.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/unwind/unwind2_rmap_closed.ma
@@ -16,6 +16,7 @@ include "delayed_updating/unwind/unwind2_rmap_eq.ma".
 include "delayed_updating/syntax/path_closed.ma".
 include "delayed_updating/syntax/path_depth.ma".
 include "ground/relocation/xap.ma".
+include "ground/lib/stream_tls_plus.ma".
 include "ground/lib/stream_eq_eq.ma".
 include "ground/arith/nat_le_plus.ma".
 include "ground/arith/nat_le_pred.ma".
@@ -74,15 +75,32 @@ lemma unwind2_rmap_append_closed_Lq_dx_nap_depth (o) (f) (p) (q) (n):
 /2 width=2 by unwind2_rmap_push_closed_nap/
 qed-.
 
+lemma unwind2_rmap_append_closed_true_dx_xap_depth (f) (p) (q) (n):
+      q ϵ 𝐂❨Ⓣ,n❩ → ♭q = ▶[f](p●q)＠❨n❩.
+#f #p #q #n #Hq elim Hq -q -n //
+#q #n #k #Ho #_ #IH
+<unwind2_rmap_d_dx <tr_compose_xap
+>Ho // <tr_uni_xap_succ <Ho //
+qed-.
+
 lemma tls_succ_plus_unwind2_rmap_push_closed (o) (f) (q) (n):
       q ϵ 𝐂❨o,n❩ →
       ∀m. ⇂*[m]f ≗ ⇂*[↑(m+n)]▶[⫯f]q.
 #o #f #q #n #Hq elim Hq -q -n //
-#q #n [ #k #_ ] #_ #IH #m
-[ @(stream_eq_trans … (tls_unwind2_rmap_d_dx …))
-  >nrplus_inj_dx >nrplus_inj_sn >nsucc_unfold //
-| <unwind2_rmap_L_dx <nplus_succ_dx //
-]
+#q #n #k #_ #_ #IH #m
+@(stream_eq_trans … (tls_unwind2_rmap_d_dx …))
+>nrplus_inj_dx >nrplus_inj_sn >nsucc_unfold //
+qed-.
+
+lemma tls_plus_unwind2_rmap_closed_true (f) (q) (n):
+      q ϵ 𝐂❨Ⓣ,n❩ →
+      ∀m. ⇂*[m]f ≗ ⇂*[m+n]▶[f]q.
+#f #q #n #Hq elim Hq -q -n //
+#q #n #k #Ho #_ #IH #m
+>Ho // <nplus_succ_dx
+@(stream_eq_trans … (tls_unwind2_rmap_d_dx …))
+>nrplus_inj_dx >nrplus_inj_sn >nsucc_unfold
+>nplus_succ_dx <Ho //
 qed-.
 
 lemma tls_succ_unwind2_rmap_append_closed_Lq_dx (o) (f) (p) (q) (n):
@@ -91,6 +109,12 @@ lemma tls_succ_unwind2_rmap_append_closed_Lq_dx (o) (f) (p) (q) (n):
 /2 width=2 by tls_succ_plus_unwind2_rmap_push_closed/
 qed-.
 
+lemma tls_unwind2_rmap_append_closed_true_dx (f) (p) (q) (n):
+      q ϵ 𝐂❨Ⓣ,n❩ →
+      ▶[f]p ≗ ⇂*[n]▶[f](p●q).
+/2 width=1 by tls_plus_unwind2_rmap_closed_true/
+qed-.
+
 lemma unwind2_rmap_append_closed_Lq_dx_nap_plus (o) (f) (p) (q) (m) (n):
       q ϵ 𝐂❨o,n❩ →
       ▶[f]p＠❨m❩+♭q = ▶[f](p●𝗟◗q)＠§❨m+n❩.
@@ -100,3 +124,21 @@ lemma unwind2_rmap_append_closed_Lq_dx_nap_plus (o) (f) (p) (q) (m) (n):
 | /2 width=2 by unwind2_rmap_append_closed_Lq_dx_nap_depth/
 ]
 qed-.
+
+lemma unwind2_rmap_append_closed_bLq_dx_nap_plus (o) (f) (p) (b) (q) (m) (n):
+      b ϵ 𝐂❨Ⓣ,m❩ → q ϵ 𝐂❨o,n❩ →
+      ♭b+♭q = ▶[f](p●b●𝗟◗q)＠§❨m+n❩.
+#o #f #p #b #q #m #n #Hb #Hq
+>(unwind2_rmap_append_closed_true_dx_xap_depth f p … Hb) -Hb
+>(unwind2_rmap_append_closed_Lq_dx_nap_plus … Hq) -Hq //
+qed-.
+
+lemma tls_succ_plus_unwind2_rmap_append_closed_bLq_dx (o) (f) (p) (b) (q) (m) (n):
+      b ϵ 𝐂❨Ⓣ,m❩ → q ϵ 𝐂❨o,n❩ →
+      ▶[f]p ≗ ⇂*[↑(m+n)]▶[f](p●b●𝗟◗q).
+#o #f #p #b #q #m #n #Hb #Hq
+>nplus_succ_dx <stream_tls_plus
+@(stream_eq_trans … (tls_unwind2_rmap_append_closed_true_dx … Hb)) -Hb
+@stream_tls_eq_repl
+@(stream_eq_trans … (tls_succ_unwind2_rmap_append_closed_Lq_dx … Hq)) -Hq //
+qed-.