milestone update in ground_2 and basic_2A

[helm.git] / matita / matita / contribs / lambdadelta / basic_2A / reduction / cnx_cix.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2A/reduction/cnx_cix.ma b/matita/matita/contribs/lambdadelta/basic_2A/reduction/cnx_cix.ma
index 40f69e00625ff40603146e16e170a6e8265af7b3..f8a1aea915bc2f830e54c0e72d0175073aa710f1 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2A/reduction/cnx_cix.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2A/reduction/cnx_cix.ma
@@ -20,7 +20,7 @@ include "basic_2A/reduction/cnx_crx.ma".
 (* Main properties on irreducibility ****************************************)
 
 theorem cix_cnx: ∀h,g,G,L,T. ⦃G, L⦄ ⊢ ➡[h, g] 𝐈⦃T⦄ → ⦃G, L⦄ ⊢ ➡[h, g] 𝐍⦃T⦄.
-/2 width=6 by cpx_fwd_cix/ qed.
+/3 width=6 by cpx_fwd_cix, sym_eq/ qed.
 
 (* Main inversion lemmas on irreducibility **********************************)