- lambdadelta: we removed focalized reduction from snv preservation

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / unwind / sstas.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma b/matita/matita/contribs/lambdadelta/basic_2/unwind/sstas.ma
index 93e63853f520e2c15b0bd37831ad08032269d87f..93fe0a7e0ee89f20f9f6b86fbe1f21c0fea93e7d 100644 (file)
--- 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 *)