X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fstatic%2Flsuba_lsuba.ma;h=bb77403bda183e4be48348fdb6e03757e3eb302c;hb=7fff13721f6e7040e76faad31583b1cb86693d2c;hp=cc4af16706e51942f5113330530aa39bb88f7e7a;hpb=7e06d9d148ae04a21943377debd933a742d0c2fa;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/static/lsuba_lsuba.ma b/matita/matita/contribs/lambdadelta/basic_2/static/lsuba_lsuba.ma
index cc4af1670..bb77403bd 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/static/lsuba_lsuba.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/static/lsuba_lsuba.ma
@@ -23,7 +23,7 @@ theorem lsuba_trans: ∀G,L1,L. G ⊢ L1 ⫃⁝ L → ∀L2. G ⊢ L ⫃⁝ L2 
 [ #X #H >(lsuba_inv_atom1 … H) -H //
 | #I #L1 #L #Y #HL1 #IHL1 #X #H
   elim (lsuba_inv_pair1 … H) -H * #L2
-  [ #HL2 #H destruct /3 width=1/
+  [ #HL2 #H destruct /3 width=1 by lsuba_pair/
   | #W #V #A #HV #HW #HL2 #H1 #H2 #H3 destruct
     /3 width=3 by lsuba_beta, lsuba_aaa_trans/
   ]