X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Flifts_weight_bind.ma;h=f151431172826d6aa62323d65235179ade7d81cb;hb=75f395f0febd02de8e0f881d918a8812b1425c8d;hp=152ecbba1223effb60e5d6f2515cd790bb8d124c;hpb=d59f344b1e4b377e2f06abd9f8856d686d21b222;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight_bind.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight_bind.ma
index 152ecbba1..f15143117 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight_bind.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight_bind.ma
@@ -20,6 +20,6 @@ include "basic_2/relocation/lifts_bind.ma".
 
 (* Forward lemmas with weight for binders ***********************************)
 
-lemma liftsb_fwd_bw: ∀f,I1,I2. ⬆*[f] I1 ≡ I2 → ♯{I1} = ♯{I2}.
+lemma liftsb_fwd_bw: ∀f,I1,I2. ⬆*[f] I1 ≘ I2 → ♯{I1} = ♯{I2}.
 #f #I1 #I2 * -I1 -I2 /2 width=2 by lifts_fwd_tw/
 qed-.