X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Funwind%2Fsstas.ma;h=93fe0a7e0ee89f20f9f6b86fbe1f21c0fea93e7d;hb=0dec595530e6da8ca16af84e40b59c998e6ed4af;hp=93e63853f520e2c15b0bd37831ad08032269d87f;hpb=8910c1dc3fcc1da950d0c71f0f1a0150c5557520;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma b/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma
index 93e63853f..93fe0a7e0 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma
@@ -47,6 +47,9 @@ qed-.
 
 (* Basic properties *********************************************************)
 
+lemma sstas_refl: ∀h,g,L. reflexive … (sstas h g L).
+// qed.
+
 lemma ssta_sstas: ∀h,g,L,T,U,l. ⦃h, L⦄ ⊢ T •[g, l+1] U → ⦃h, L⦄ ⊢ T •*[g] U.
 /3 width=2 by R_to_star, ex_intro/ qed. (**) (* auto fails without trace *)