X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fstatic%2Flsubf_lsubr.ma;h=24b7e90d2b63667ebf0038a1bec6e9f099c9f6fc;hb=75f395f0febd02de8e0f881d918a8812b1425c8d;hp=936518fcbbf7e54683332f8854f91bcc7701c74c;hpb=d59f344b1e4b377e2f06abd9f8856d686d21b222;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/static/lsubf_lsubr.ma b/matita/matita/contribs/lambdadelta/basic_2/static/lsubf_lsubr.ma
index 936518fcb..24b7e90d2 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/static/lsubf_lsubr.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/static/lsubf_lsubr.ma
@@ -44,8 +44,8 @@ elim (isid_inv_gen … Hf2) -Hf2 #g2 #Hg2 #H destruct
 /3 width=1 by lsubf_push/
 qed.
 
-lemma lsubr_lsubf: ∀f2,L2,T. L2 ⊢ 𝐅*⦃T⦄ ≡ f2 → ∀L1. L1 ⫃ L2 →
-                   ∀f1. L1 ⊢ 𝐅*⦃T⦄ ≡ f1 → ⦃L1, f1⦄ ⫃𝐅* ⦃L2, f2⦄.
+lemma lsubr_lsubf: ∀f2,L2,T. L2 ⊢ 𝐅*⦃T⦄ ≘ f2 → ∀L1. L1 ⫃ L2 →
+                   ∀f1. L1 ⊢ 𝐅*⦃T⦄ ≘ f1 → ⦃L1, f1⦄ ⫃𝐅* ⦃L2, f2⦄.
 #f2 #L2 #T #H elim H -f2 -L2 -T
 [ #f2 #L2 #s #Hf2 #L1 #HL12 #f1 #Hf1
   lapply (frees_inv_sort … Hf1) -Hf1 /2 width=1 by lsubr_lsubf_isid/