X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fstatic%2Freqg_drops.ma;h=af6db9105c6f60dca9f85c9501d17f2e83a14811;hb=11093619476326238c2ef9d2dfe9150b8c9bc920;hp=56cbd534c022b0be133280475a1dd104575a8291;hpb=b118146b97959e6a6dde18fdd014b8e1e676a2d1;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/static/reqg_drops.ma b/matita/matita/contribs/lambdadelta/static_2/static/reqg_drops.ma
index 56cbd534c..af6db9105 100644
--- a/matita/matita/contribs/lambdadelta/static_2/static/reqg_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/reqg_drops.ma
@@ -35,7 +35,7 @@ lemma reqg_inv_lifts_dx (S):
 /2 width=5 by rex_dropable_dx/ qed-.
 
 lemma reqg_inv_lifts_bi (S):
-      ∀L1,L2,U. L1 ≛[S,U] L2 → ∀b,f. 𝐔❪f❫ →
+      ∀L1,L2,U. L1 ≛[S,U] L2 → ∀b,f. 𝐔❨f❩ →
       ∀K1,K2. ⇩*[b,f] L1 ≘ K1 → ⇩*[b,f] L2 ≘ K2 →
       ∀T. ⇧*[f] T ≘ U → K1 ≛[S,T] K2.
 /2 width=10 by rex_inv_lifts_bi/ qed-.