X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Fpr_coafter_isi.ma;h=5ed452f2b2a7231ffd123158406bae3dfe608ea9;hb=873fb39bdd21aa14877bf5d50db26e3a050c6d43;hp=7bed357e17e61ce35f9389c90529947a9542d821;hpb=503500ff9a6d9cca363a42b5fe7f3f5de69239f9;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/pr_coafter_isi.ma b/matita/matita/contribs/lambdadelta/ground/relocation/pr_coafter_isi.ma
index 7bed357e1..5ed452f2b 100644
--- a/matita/matita/contribs/lambdadelta/ground/relocation/pr_coafter_isi.ma
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/pr_coafter_isi.ma
@@ -41,7 +41,7 @@ qed.
 
 (*** coafter_isid_inv_sn *)
 lemma pr_coafter_isi_inv_sn:
-      ∀f1,f2,f. f1 ~⊚ f2 ≘ f → 𝐈❨f1❩ → f2 ≡ f.
+      ∀f1,f2,f. f1 ~⊚ f2 ≘ f → 𝐈❨f1❩ → f2 ≐ f.
 /3 width=6 by pr_coafter_isi_sn, pr_coafter_mono/ qed-.
 
 (*** coafter_isid_inv_dx *)