X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fi_dynamic%2Fntas.ma;h=8db13303581a45042b68cb06a76d4bab24265ad6;hp=7f74c5f063971899044f2ae726f2fef2c4f3002c;hb=ca7327c20c6031829fade8bb84a3a1bb66113f54;hpb=25c634037771dff0138e5e8e3d4378183ff49b86

diff --git a/matita/matita/contribs/lambdadelta/basic_2/i_dynamic/ntas.ma b/matita/matita/contribs/lambdadelta/basic_2/i_dynamic/ntas.ma
index 7f74c5f06..8db133035 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/i_dynamic/ntas.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/i_dynamic/ntas.ma
@@ -18,7 +18,7 @@ include "basic_2/dynamic/cnv.ma".
 (* ITERATED NATIVE TYPE ASSIGNMENT FOR TERMS ********************************)
 
 definition ntas (h) (a) (n) (G) (L): relation term ≝ λT,U.
-           ∃∃U0. ❪G,L❫ ⊢ U ![h,a] & ❪G,L❫ ⊢ T ![h,a] & ❪G,L❫ ⊢ U ➡*[h] U0 & ❪G,L❫ ⊢ T ➡*[n,h] U0.
+           ∃∃U0. ❪G,L❫ ⊢ U ![h,a] & ❪G,L❫ ⊢ T ![h,a] & ❪G,L❫ ⊢ U ➡*[h,0] U0 & ❪G,L❫ ⊢ T ➡*[h,n] U0.
 
 interpretation "iterated native type assignment (term)"
    'ColonStar h a n G L T U = (ntas h a n G L T U).
@@ -27,7 +27,7 @@ interpretation "iterated native type assignment (term)"
 
 lemma ntas_intro (h) (a) (n) (G) (L):
       ∀U. ❪G,L❫ ⊢ U ![h,a] → ∀T. ❪G,L❫ ⊢ T ![h,a] →
-      ∀U0. ❪G,L❫ ⊢ U ➡*[h] U0 → ❪G,L❫ ⊢ T ➡*[n,h] U0 → ❪G,L❫ ⊢ T :*[h,a,n] U.
+      ∀U0. ❪G,L❫ ⊢ U ➡*[h,0] U0 → ❪G,L❫ ⊢ T ➡*[h,n] U0 → ❪G,L❫ ⊢ T :*[h,a,n] U.
 /2 width=3 by ex4_intro/ qed.
 
 lemma ntas_refl (h) (a) (G) (L):