update in lambdadelta

[helm.git] / matita / matita / contribs / lambdadelta / basic_2A / unfold / lstas_llpx_sn.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2A/unfold/lstas_llpx_sn.ma b/matita/matita/contribs/lambdadelta/basic_2A/unfold/lstas_llpx_sn.ma
new file mode 100644 (file)
index 0000000..07ee72b
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/basic_2A/unfold/lstas_llpx_sn.ma
@@ -0,0 +1,44 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||M||                                                             *)
+(*      ||A||       A project by Andrea Asperti                           *)
+(*      ||T||                                                             *)
+(*      ||I||       Developers:                                           *)
+(*      ||T||         The HELM team.                                      *)
+(*      ||A||         http://helm.cs.unibo.it                             *)
+(*      \   /                                                             *)
+(*       \ /        This file is distributed under the terms of the       *)
+(*        v         GNU General Public License Version 2                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+include "basic_2A/multiple/llpx_sn_drop.ma".
+include "basic_2A/unfold/lstas.ma".
+
+(* NAT-ITERATED STATIC TYPE ASSIGNMENT FOR TERMS ****************************)
+
+(* Properties on lazy sn pointwise extensions *******************************)
+
+lemma lstas_llpx_sn_conf: ∀R. (∀L. reflexive … (R L)) → d_liftable R →
+                          ∀h,G,d. s_r_confluent1 … (lstas h d G) (llpx_sn R 0).
+#R #H1R #H2R #h #G #d #Ls #T1 #T2 #H elim H -G -Ls -T1 -T2 -d
+[ /3 width=4 by llpx_sn_fwd_length, llpx_sn_sort/
+| #G #Ls #Ks #V1s #V2s #W2s #i #d #HLKs #_ #HVW2s #IHV12s #Ld #H elim (llpx_sn_inv_lref_ge_sn … H … HLKs) // -H
+  #Kd #V1l #HLKd #HV1s #HV1sd
+  lapply (drop_fwd_drop2 … HLKs) -HLKs #HLKs
+  lapply (drop_fwd_drop2 … HLKd) -HLKd #HLKd
+  @(llpx_sn_lift_le … HLKs HLKd … HVW2s) -HLKs -HLKd -HVW2s /2 width=1 by/ (**) (* full auto too slow *)
+| //
+| #G #Ls #Ks #V1s #V2s #W2s #i #d #HLKs #_ #HVW2s #IHV12s #Ld #H elim (llpx_sn_inv_lref_ge_sn … H … HLKs) // -H
+  #Kd #V1l #HLKd #HV1s #HV1sd
+  lapply (drop_fwd_drop2 … HLKs) -HLKs #HLKs
+  lapply (drop_fwd_drop2 … HLKd) -HLKd #HLKd
+  @(llpx_sn_lift_le … HLKs HLKd … HVW2s) -HLKs -HLKd -HVW2s /2 width=1 by/ (**) (* full auto too slow *)
+| #a #I #G #Ls #V #T1 #T2 #d #_ #IHT12 #Ld #H elim (llpx_sn_inv_bind_O … H) -H
+  /4 width=5 by llpx_sn_bind_repl_SO, llpx_sn_bind/
+| #G #Ls #V #T1 #T2 #d #_ #IHT12 #Ld #H elim (llpx_sn_inv_flat … H) -H
+  /3 width=1 by llpx_sn_flat/
+| #G #Ls #V #T1 #T2 #d #_ #IHT12 #Ld #H elim (llpx_sn_inv_flat … H) -H
+  /3 width=1 by llpx_sn_flat/
+]
+qed-.