update in basic_2

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / dynamic / cnv_cpes.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpes.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpes.ma
index c7da941590a5815b2a641d6ced968601c48e4405..3437d2629855bef48a42c12ceaa5a4729a4f1607 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpes.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/cnv_cpes.ma
@@ -14,7 +14,7 @@
 
 include "basic_2/rt_computation/cpms_cpms.ma".
 include "basic_2/rt_equivalence/cpes.ma".
-include "basic_2/dynamic/cnv.ma".
+include "basic_2/dynamic/cnv_aaa.ma".
 
 (* CONTEXT-SENSITIVE NATIVE VALIDITY FOR TERMS ******************************)
 
@@ -46,6 +46,25 @@ elim (cnv_inv_appl … H) -H #n #p #W #U #Hn #HV #HT #HVW #HTU
 /3 width=7 by cpms_div, ex5_4_intro/
 qed-.
 
+lemma cnv_inv_appl_SO_cpes (a) (h) (G) (L):
+      ∀V,T. ⦃G, L⦄ ⊢ ⓐV.T ![a, h] →
+      ∃∃n,p,W,U. a = Ⓣ → n = 1 & ⦃G, L⦄ ⊢ V ![a, h] & ⦃G, L⦄ ⊢ T ![a, h] &
+                 ⦃G, L⦄ ⊢ V ⬌*[h,1,0] W & ⦃G, L⦄ ⊢ T ➡*[n, h] ⓛ{p}W.U.
+#a #h #G #L #V #T #H
+elim (cnv_inv_appl_SO … H) -H #n #p #W #U #Hn #HV #HT #HVW #HTU
+/3 width=7 by cpms_div, ex5_4_intro/
+qed-.
+
+lemma cnv_inv_appl_true_cpes (h) (G) (L):
+      ∀V,T. ⦃G,L⦄ ⊢ ⓐV.T ![h] →
+      ∃∃p,W,U. ⦃G,L⦄ ⊢ V ![h] & ⦃G,L⦄ ⊢ T ![h] &
+                 ⦃G,L⦄ ⊢ V ⬌*[h,1,0] W & ⦃G,L⦄ ⊢ T ➡*[1,h] ⓛ{p}W.U.
+#h #G #L #V #T #H
+elim (cnv_inv_appl_SO_cpes … H) -H #n #p #W #U #Hn
+>Hn -n [| // ] #HV #HT #HVW #HTU
+/2 width=5 by ex4_3_intro/
+qed-.
+
 lemma cnv_inv_cast_cpes (a) (h) (G) (L):
       ∀U,T. ⦃G, L⦄ ⊢ ⓝU.T ![a, h] →
       ∧∧ ⦃G, L⦄ ⊢ U ![a, h] & ⦃G, L⦄ ⊢ T ![a, h] & ⦃G, L⦄ ⊢ U ⬌*[h,0,1] T.