- we introduced the pointer_step rc in the perspective of proving

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

diff --git a/matita/matita/contribs/lambda_delta/basic_2/unfold/ldrops_ldrops.ma b/matita/matita/contribs/lambda_delta/basic_2/unfold/ldrops_ldrops.ma
index 1cb1724fdaa2184d5633c842213ba89176f4cf5c..7709561a29f7fbbc1b9371d5e7c90d563eb41a7d 100644 (file)
--- a/matita/matita/contribs/lambda_delta/basic_2/unfold/ldrops_ldrops.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/unfold/ldrops_ldrops.ma
@@ -20,6 +20,6 @@ include "basic_2/unfold/ldrops_ldrop.ma".
 
 (* Basic_1: was: drop1_trans *)
 theorem ldrops_trans: ∀L,L2,des2. ⇩*[des2] L ≡ L2 → ∀L1,des1. ⇩*[des1] L1 ≡ L →
-                      ⇩*[des2 @ des1] L1 ≡ L2.
+                      ⇩*[des2 @@ des1] L1 ≡ L2.
 #L #L2 #des2 #H elim H -L -L2 -des2 // /3 width=3/
 qed.