X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fgrammar%2Fcl_shift.ma;h=5fdab714803901ce4288735f57e828a69aa5f225;hb=b5d702735754632652b2659c425dd67d7f92f24b;hp=bbdc8e7d09555bb6fad776196ffb37464c21922f;hpb=e8998d29ab83e7b6aa495a079193705b2f6743d3;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/grammar/cl_shift.ma b/matita/matita/contribs/lambdadelta/basic_2/grammar/cl_shift.ma
index bbdc8e7d0..5fdab7148 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/grammar/cl_shift.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/grammar/cl_shift.ma
@@ -39,8 +39,7 @@ lemma shift_inj: ∀L1,L2. ∀T1,T2:term. L1 @@ T1 = L2 @@ T2 → |L1| = |L2| 
 | #L1 #H1 #V1 #IH * normalize
   [ #T1 #T2 #_ <plus_n_Sm #H destruct
   | #L2 #I2 #V2 #T1 #T2 #H1 #H2
-    elim (IH … H1 ?) -IH -H1 /2 width=1/ -H2 #H1 #H2 destruct /2 width=1/
+    elim (IH … H1) -IH -H1 /2 width=1/ -H2 #H1 #H2 destruct /2 width=1/
   ]
 ]
 qed-.
-  
\ No newline at end of file