X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fdynamic%2Flsubsv_lsubd.ma;h=cd96040bf894f15ec63048196a750dc9c959e72a;hb=7fff13721f6e7040e76faad31583b1cb86693d2c;hp=86007b1f5cdbe9e32ec3947f3617005f8ded70e1;hpb=f282b35b958c9602fb1f47e5677b5805a046ac76;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubsv_lsubd.ma b/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubsv_lsubd.ma
index 86007b1f5..cd96040bf 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubsv_lsubd.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/dynamic/lsubsv_lsubd.ma
@@ -19,6 +19,6 @@ include "basic_2/dynamic/lsubsv.ma".
 
 (* Forward lemmas on lenv refinement for degree assignment ******************)
 
-lemma lsubsv_fwd_lsubd: ∀h,g,G,L1,L2. G ⊢ L1 ¡⫃[h, g] L2 → G ⊢ L1 ▪⫃[h, g] L2.
-#h #g #G #L1 #L2 #H elim H -L1 -L2 // /2 width=1/ /2 width=3/
+lemma lsubsv_fwd_lsubd: ∀h,g,G,L1,L2. G ⊢ L1 ⫃¡[h, g] L2 → G ⊢ L1 ⫃▪[h, g] L2.
+#h #g #G #L1 #L2 #H elim H -L1 -L2 /2 width=3 by lsubd_pair, lsubd_beta/
 qed-.