X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fcomputation%2Fcpxs_lift.ma;h=6b4fddb8818b98c3bdc21963720b11b697b76b6d;hb=86a84e4116a8d388cb540bae6c60700f84a8f9f8;hp=6bf2413fbc735d575ba044d7a78f61da4f2a5dea;hpb=472cb969d9a01a6d24eabc39ba20d1dc6adf1b04;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/computation/cpxs_lift.ma b/matita/matita/contribs/lambdadelta/basic_2/computation/cpxs_lift.ma
index 6bf2413fb..6b4fddb88 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/computation/cpxs_lift.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/computation/cpxs_lift.ma
@@ -13,7 +13,6 @@
 (**************************************************************************)
 
 include "basic_2/multiple/fqus_fqus.ma".
-include "basic_2/unfold/lstas_da.ma".
 include "basic_2/reduction/cpx_lift.ma".
 include "basic_2/computation/cpxs.ma".
 
@@ -21,17 +20,6 @@ include "basic_2/computation/cpxs.ma".
 
 (* Advanced properties ******************************************************)
 
-lemma lstas_cpxs: ∀h,g,G,L,T1,T2,l1. ⦃G, L⦄ ⊢ T1 •* [h, l1] T2 →
-                  ∀l2. ⦃G, L⦄ ⊢ T1 ▪ [h, g] l2 → l1 ≤ l2 → ⦃G, L⦄ ⊢ T1 ➡*[h, g] T2.
-#h #g #G #L #T1 #T2 #l1 #H @(lstas_ind_dx … H) -T2 -l1 //
-#l1 #T #T2 #HT1 #HT2 #IHT1 #l2 #Hl2 #Hl12
-lapply (lstas_da_conf … HT1 … Hl2) -HT1
->(plus_minus_m_m (l2-l1) 1 ?)
-[ /4 width=5 by cpxs_strap1, sta_cpx, lt_to_le/
-| /2 width=1 by monotonic_le_minus_r/
-]
-qed.
-
 lemma cpxs_delta: ∀h,g,I,G,L,K,V,V2,i.
                   ⇩[i] L ≡ K.ⓑ{I}V → ⦃G, K⦄ ⊢ V ➡*[h, g] V2 →
                   ∀W2. ⇧[0, i+1] V2 ≡ W2 → ⦃G, L⦄ ⊢ #i ➡*[h, g] W2.
@@ -42,6 +30,24 @@ lemma cpxs_delta: ∀h,g,I,G,L,K,V,V2,i.
 ]
 qed.
 
+lemma lstas_cpxs: ∀h,g,G,L,T1,T2,l2. ⦃G, L⦄ ⊢ T1 •*[h, l2] T2 →
+                  ∀l1. ⦃G, L⦄ ⊢ T1 ▪[h, g] l1 → l2 ≤ l1 → ⦃G, L⦄ ⊢ T1 ➡*[h, g] T2.
+#h #g #G #L #T1 #T2 #l2 #H elim H -G -L -T1 -T2 -l2 //
+[ /3 width=3 by cpxs_sort, da_inv_sort/
+| #G #L #K #V1 #V2 #W2 #i #l2 #HLK #_ #HVW2 #IHV12 #l1 #H #Hl21
+  elim (da_inv_lref … H) -H * #K0 #V0 [| #l0 ] #HLK0
+  lapply (drop_mono … HLK0 … HLK) -HLK0 #H destruct /3 width=7 by cpxs_delta/
+| #G #L #K #V1 #V2 #W2 #i #l2 #HLK #_ #HVW2 #IHV12 #l1 #H #Hl21
+  elim (da_inv_lref … H) -H * #K0 #V0 [| #l0 ] #HLK0
+  lapply (drop_mono … HLK0 … HLK) -HLK0 #H destruct
+  #HV1 #H destruct lapply (le_plus_to_le_r … Hl21) -Hl21
+  /3 width=7 by cpxs_delta/
+| /4 width=3 by cpxs_bind_dx, da_inv_bind/
+| /4 width=3 by cpxs_flat_dx, da_inv_flat/
+| /4 width=3 by cpxs_eps, da_inv_flat/
+]
+qed.
+
 (* Advanced inversion lemmas ************************************************)
 
 lemma cpxs_inv_lref1: ∀h,g,G,L,T2,i. ⦃G, L⦄ ⊢ #i ➡*[h, g] T2 →
@@ -90,7 +96,7 @@ qed-.
 
 lemma fquq_lstas_trans: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐⸮ ⦃G2, L2, T2⦄ →
                         ∀U2,l1. ⦃G2, L2⦄ ⊢ T2 •*[h, l1] U2 →
-                        ∀l2. ⦃G2, L2⦄ ⊢ T2 ▪ [h, g] l2 → l1 ≤ l2 →
+                        ∀l2. ⦃G2, L2⦄ ⊢ T2 ▪[h, g] l2 → l1 ≤ l2 →
                         ∃∃U1. ⦃G1, L1⦄ ⊢ T1 ➡*[h, g] U1 & ⦃G1, L1, U1⦄ ⊐⸮ ⦃G2, L2, U2⦄.
 /3 width=5 by fquq_cpxs_trans, lstas_cpxs/ qed-.
 
@@ -113,6 +119,6 @@ qed-.
 
 lemma fqus_lstas_trans: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ⊐* ⦃G2, L2, T2⦄ →
                         ∀U2,l1. ⦃G2, L2⦄ ⊢ T2 •*[h, l1] U2 →
-                        ∀l2. ⦃G2, L2⦄ ⊢ T2 ▪ [h, g] l2 → l1 ≤ l2 →
+                        ∀l2. ⦃G2, L2⦄ ⊢ T2 ▪[h, g] l2 → l1 ≤ l2 →
                         ∃∃U1. ⦃G1, L1⦄ ⊢ T1 ➡*[h, g] U1 & ⦃G1, L1, U1⦄ ⊐* ⦃G2, L2, U2⦄.
 /3 width=6 by fqus_cpxs_trans, lstas_cpxs/ qed-.