X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fs_computation%2Ffqup_drops.ma;h=f2db58c837d1aaae401ac8d7798f01a70dcbb97a;hp=fbcca9516abb818b14cc447f703524476bb8c6e1;hb=222044da28742b24584549ba86b1805a87def070;hpb=75f395f0febd02de8e0f881d918a8812b1425c8d

diff --git a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
index fbcca9516..f2db58c83 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/s_computation/fqup_drops.ma
@@ -19,7 +19,7 @@ include "basic_2/s_computation/fqup.ma".
 
 (* Properties with generic slicing for local environments *******************)
 
-lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[⫯i] L ≘ K → ⬆*[⫯i] T ≘ U →
+lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[↑i] L ≘ K → ⬆*[↑i] T ≘ U →
                        ⦃G, L, U⦄ ⊐+[b] ⦃G, K, T⦄.
 #b #G #K #T #i elim i -i
 [ #L #U #HLK #HTU elim (drops_inv_succ … HLK) -HLK
@@ -27,7 +27,7 @@ lemma fqup_drops_succ: ∀b,G,K,T,i,L,U. ⬇*[⫯i] L ≘ K → ⬆*[⫯i] T ≘
   /3 width=2 by fqu_fqup, fqu_drop/
 | #l #IH #L #U #HLK #HTU elim (drops_inv_succ … HLK) -HLK
   #I #Y #HY #H destruct
-  elim (lifts_split_trans … HTU … (𝐔❴⫯l❵) (𝐔❴1❵)) -HTU
+  elim (lifts_split_trans … HTU … (𝐔❴↑l❵) (𝐔❴1❵)) -HTU
   /4 width=5 by fqup_strap2, fqu_drop/
 ]
 qed.