X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Fdynamic%2Fnta_sta.ma;h=6268b98b1a9a3cbdcf704eb4f256942be8c91010;hb=bcdba61431ead40a18a6ac04285cd6513d491287;hp=d064d2e7d20a2142874cfb3f27f21c4e7666b845;hpb=913512bbc9202f2109d53acd43dc8c0270b17184;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/basic_2/dynamic/nta_sta.ma b/matita/matita/contribs/lambda_delta/basic_2/dynamic/nta_sta.ma
index d064d2e7d..6268b98b1 100644
--- a/matita/matita/contribs/lambda_delta/basic_2/dynamic/nta_sta.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/dynamic/nta_sta.ma
@@ -13,35 +13,30 @@
 (**************************************************************************)
 
 include "basic_2/static/sta.ma".
-include "basic_2/dynamic/nta_lift.ma".
+include "basic_2/equivalence/cpcs_cpcs.ma".
+include "basic_2/dynamic/nta.ma".
 
 (* NATIVE TYPE ASSIGNMENT ON TERMS ******************************************)
 
-axiom pippo: ∀h,L,X,Y1,U. ⦃h, L⦄ ⊢ ⓐX.Y1 : U → ∀Y2. L ⊢ Y1 ⬌* Y2 →
-             ∀U2. ⦃h, L⦄ ⊢ Y2 : U2 → ⦃h, L⦄ ⊢ ⓐX.Y2 : U.
-
 (* Properties on static type assignment *************************************)
 
 lemma nta_fwd_sta: ∀h,L,T,U. ⦃h, L⦄ ⊢ T : U →
-                   ∃∃U0. ⦃h, L⦄ ⊢ T • U0 & L ⊢ U0 ⬌* U & ⦃h, L⦄ ⊢ T : U0.
+                   ∃∃U0. ⦃h, L⦄ ⊢ T • U0 & L ⊢ U0 ⬌* U.
 #h #L #T #U #H elim H -L -T -U
-[ /2 width=4/
-| #L #K #V #W1 #V1 #i #HLK #_ #HWV1 * #W0 #H1VW0 #HW01 #H2VW0
+[ /2 width=3/
+| #L #K #V #W1 #V1 #i #HLK #_ #HWV1 * #W0 #HVW0 #HW01
   elim (lift_total W0 0 (i+1)) #V0 #HWV0
   lapply (ldrop_fwd_ldrop2 … HLK) #HLK0
-  lapply (cpcs_lift … HLK0 … HWV0 … HWV1 HW01) -HLK0 -HWV1 -HW01 /3 width=9/
-| #L #K #W #V1 #W1 #i #HLK #HWV1 #HW1 * /3 width=9/
-| #I #L #V #W #T #U #_ #_ * #W0 #_ #_ #H2VW0 * /3 width=4/
-| #L #V #W #T #U #_ #_ * #W0 #_ #HW0 #H2VW0 * #X #H1 #HX #H2
-  elim (sta_inv_bind1 … H1) -H1 #U0 #HTU0 #H destruct
-  elim (nta_inv_bind1 … H2) /4 width=4/
-| #L #V #W #T #U #_ #_ * #U0 #H1TU0 #HU0 #H2TU0 * #W0 #_ #_ #H2UW0 -W
-  elim (nta_fwd_correct … H2TU0) #T0 #HUT0
-  @(ex3_1_intro … (ⓐV.U0)) /2 width=1/ -H1TU0
-  @(nta_pure … W0 … H2TU0) -T /3 width=3/
-| #L #T #U #HTU * #U0 #H1TU0 #HU0 #H2TU0
-  elim (nta_fwd_correct … H2TU0) -H2TU0 /4 width=8/
-| #L #T #U1 #U2 #V2 #_ #HU12 #_ * #U0 #H1TU0 #HU01 #H2TU0 #_
-  lapply (cpcs_trans … HU01 … HU12) -U1 /2 width=4/
+  lapply (cpcs_lift … HLK0 … HWV0 … HWV1 HW01) -HLK0 -HWV1 -HW01 /3 width=6/
+| #L #K #W #V1 #W1 #i #HLK #HWV1 #HW1 * /3 width=6/
+| #I #L #V #W #T #U #_ #_ * #W0 #_ #_ * /3 width=3/
+| #L #V #W #T #U #_ #_ * #W0 #_ #HW0 * #X #H #HX
+  elim (sta_inv_bind1 … H) -H #U0 #HTU0 #H destruct
+  @(ex2_1_intro … (ⓐV.ⓛW.U0)) /2 width=1/ /3 width=1/
+| #L #V #W #T #U #_ #_ * #U0 #HTU0 #HU0 #_ -W
+  @(ex2_1_intro … (ⓐV.U0)) /2 width=1/
+| #L #T #U #HTU * #U0 #HTU0 #HU0 /3 width=3/
+| #L #T #U1 #U2 #V2 #_ #HU12 #_ * #U0 #HTU0 #HU01 #_
+  lapply (cpcs_trans … HU01 … HU12) -U1 /2 width=3/
 ]
 qed-.