- partial commit (unfold component only)

[helm.git] / matita / matita / contribs / lambda_delta / basic_2 / unfold / tpss.ma

diff --git a/matita/matita/contribs/lambda_delta/basic_2/unfold/tpss.ma b/matita/matita/contribs/lambda_delta/basic_2/unfold/tpss.ma
index a48f52ade156674fb5fca5a6b5d94f0a49bb1a14..26dd58ee6b04cb30349b86fb79c1ce6719a867de 100644 (file)
--- a/matita/matita/contribs/lambda_delta/basic_2/unfold/tpss.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/unfold/tpss.ma
@@ -40,6 +40,10 @@ qed-.
 
 (* Basic properties *********************************************************)
 
+lemma tpss_strap1: ∀L,T1,T,T2,d,e.
+                   L ⊢ T1 ▶* [d, e] T → L ⊢ T ▶ [d, e] T2 → L ⊢ T1 ▶* [d, e] T2. 
+/2 width=3/ qed.
+
 lemma tpss_strap2: ∀L,T1,T,T2,d,e.
                    L ⊢ T1 ▶ [d, e] T → L ⊢ T ▶* [d, e] T2 → L ⊢ T1 ▶* [d, e] T2. 
 /2 width=3/ qed.