X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fstatic%2Ffle_drops.ma;h=4ce02b60b6e19d9304e0797d52502770f7828589;hb=26d2ecb945a881c61d03f3c259996374209f5d7f;hp=ca9549a06d087851d1ff3e96e636613a85a8c5b9;hpb=02128ad2d07f4763e311a7f449d87aa022014c1f;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/basic_2/static/fle_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/static/fle_drops.ma
index ca9549a06..4ce02b60b 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/static/fle_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/static/fle_drops.ma
@@ -24,8 +24,7 @@ lemma fle_bind_dx: ∀T,U. ⬆*[1] T ≡ U →
 #T #U #HTU #p #I #L #V
 elim (frees_total L V) #f1 #Hf1
 elim (frees_total L T) #f2 #Hf2
-elim (sor_isfin_ex f1 f2) /3 width=3 by frees_fwd_isfin, isfin_tl/ #f #H #_
-lapply (sor_inv_sle_dx … H) #Hf0
->(tl_push_rew f) in H; #Hf
-/6 width=6 by frees_lifts_SO, frees_bind, drops_refl, drops_drop, ex3_2_intro/
+elim (sor_isfin_ex f1 f2) /3 width=3 by frees_fwd_isfin, isfin_tl/ #f #Hf #_
+lapply (sor_inv_sle_dx … Hf) #Hf0
+/6 width=8 by frees_lifts_SO, frees_bind, drops_refl, drops_drop, sle_tls, ex4_4_intro/
 qed.