update in ground_2 static_2 basic_2

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

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_eval.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_eval.ma
index ab9f1c4d34b0e5f37d6cc07363e0e66659d81760..1b58977b0b72f3dca8880e305b93d79bee148c22 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_eval.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/nta_eval.ma
@@ -19,16 +19,16 @@ include "basic_2/dynamic/nta_preserve.ma".
 
 (* Properties with evaluations for rt-transition on terms *******************)
 
-lemma nta_typecheck_dec (a) (h) (G) (L):
+lemma nta_typecheck_dec (a) (h) (G) (L): ac_props a →
       ∀T,U. Decidable … (⦃G,L⦄ ⊢ T :[a,h] U).
 /2 width=1 by cnv_dec/ qed-.
 
 (* Basic_1: uses: ty3_inference *)
-lemma nta_inference_dec (a) (h) (G) (L) (T):
+lemma nta_inference_dec (a) (h) (G) (L) (T): ac_props a →
       ∨∨ ∃U. ⦃G,L⦄ ⊢ T :[a,h] U
        | ∀U. (⦃G,L⦄ ⊢ T :[a,h] U → ⊥).
-#a #h #G #L #T
-elim (cnv_dec a h G L T)
+#a #h #G #L #T #Ha
+elim (cnv_dec … h G L T Ha) -Ha
 [ /3 width=1 by cnv_nta_sn, or_introl/
 | /4 width=2 by nta_fwd_cnv_sn, or_intror/
 ]