update in ground

[helm.git] / matita / matita / contribs / lambdadelta / basic_2A / unfold / unfold.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2A/unfold/unfold.ma b/matita/matita/contribs/lambdadelta/basic_2A/unfold/unfold.ma
index 063d9c7bb296feaca83af05198a04cc9e423df54..f949f5e3927d2934ef47f2560189f3110884419b 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2A/unfold/unfold.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2A/unfold/unfold.ma
@@ -24,7 +24,7 @@ inductive unfold: relation4 genv lenv term lenv ≝
 | unfold_sort: ∀G,L,k. unfold G L (⋆k) L
 | unfold_lref: ∀I,G,L1,L2,K1,K2,V,i. ⬇[i] L1 ≡ K1. ⓑ{I}V →
                unfold G K1 V K2 → ⬇[Ⓣ, |L2|, i] L2 ≡ K2 →
-               unfold G L1 (#i) (L1@@L2)
+               unfold G L1 (#i) (L1;;L2)
 | unfold_bind: ∀a,I,G,L1,L2,V,T.
                unfold G (L1.ⓑ{I}V) T L2 → unfold G L1 (ⓑ{a,I}V.T) L2
 | unfold_flat: ∀I,G,L1,L2,V,T.