X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground_2%2Frelocation%2Fnstream_istot.ma;h=d2bd0837e41959f45c6ffea20ddac132992d7611;hb=859c5cbb8ebffeddd1dd9cbc462e046b0709b4e4;hp=0001b90b9c06cff094db74fc2b49b3d54da71815;hpb=b9526dac808d40bf89dc378cf9c5ea0c121526a4;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground_2/relocation/nstream_istot.ma b/matita/matita/contribs/lambdadelta/ground_2/relocation/nstream_istot.ma
index 0001b90b9..d2bd0837e 100644
--- a/matita/matita/contribs/lambdadelta/ground_2/relocation/nstream_istot.ma
+++ b/matita/matita/contribs/lambdadelta/ground_2/relocation/nstream_istot.ma
@@ -98,8 +98,6 @@ lemma apply_S1: ∀f,i. (⫯f)@❴i❵ = ⫯(f@❴i❵).
 qed.
 
 (* Main inversion lemmas ****************************************************)
-(*
-lemma apply_inj_aux: ∀f1,f2,j1,j2,i1,i2. f1@❴i1❵ = j1 → f2@❴i2❵ = j2 →
-                     j1 = j2 → f1 ≗ f2 → i1 = i2.
-/2 width=6 by at_inj/ qed-.
-*)
+
+theorem apply_inj: ∀f,i1,i2,j. f@❴i1❵ = j → f@❴i2❵ = j → i1 = i2.
+/2 width=4 by at_inj/ qed-.