X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Flifts_weight.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Flifts_weight.ma;h=3504082babdb051ade23e800a094aa05f805c967;hb=75f395f0febd02de8e0f881d918a8812b1425c8d;hp=c6ad5b974b2e94113fdb4c1b15128aa858f5bc4a;hpb=d59f344b1e4b377e2f06abd9f8856d686d21b222;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight.ma
index c6ad5b974..3504082ba 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight.ma
@@ -20,6 +20,6 @@ include "basic_2/relocation/lifts.ma".
 (* Forward lemmas with weight for terms *************************************)
 
 (* Basic_2A1: includes: lift_fwd_tw *)
-lemma lifts_fwd_tw: ∀f,T1,T2. ⬆*[f] T1 ≡ T2 → ♯{T1} = ♯{T2}.
+lemma lifts_fwd_tw: ∀f,T1,T2. ⬆*[f] T1 ≘ T2 → ♯{T1} = ♯{T2}.
 #f #T1 #T2 #H elim H -f -T1 -T2 normalize //
 qed-.