X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Flifts_simple.ma;h=7d436c7b73833fa15caa99446e4136fdb08c1f19;hp=9afa0c02fd605f06fcb5df89bfe5228055990a71;hb=222044da28742b24584549ba86b1805a87def070;hpb=09b4420070d6a71990e16211e499b51dbb0742cb

diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_simple.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_simple.ma
index 9afa0c02f..7d436c7b7 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_simple.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_simple.ma
@@ -20,13 +20,13 @@ include "basic_2/relocation/lifts.ma".
 (* Forward lemmas with simple terms *****************************************)
 
 (* Basic_2A1: includes: lift_simple_dx *)
-lemma lifts_simple_dx: ∀f,T1,T2. ⬆*[f] T1 ≡ T2 → 𝐒⦃T1⦄ → 𝐒⦃T2⦄.
+lemma lifts_simple_dx: ∀f,T1,T2. ⬆*[f] T1 ≘ T2 → 𝐒⦃T1⦄ → 𝐒⦃T2⦄.
 #f #T1 #T2 #H elim H -f -T1 -T2 //
 #f #p #I #V1 #V2 #T1 #T2 #_ #_ #_ #_ #H elim (simple_inv_bind … H)
 qed-.
 
 (* Basic_2A1: includes: lift_simple_sn *)
-lemma lifts_simple_sn: ∀f,T1,T2. ⬆*[f] T1 ≡ T2 → 𝐒⦃T2⦄ → 𝐒⦃T1⦄.
+lemma lifts_simple_sn: ∀f,T1,T2. ⬆*[f] T1 ≘ T2 → 𝐒⦃T2⦄ → 𝐒⦃T1⦄.
 #f #T1 #T2 #H elim H -f -T1 -T2 //
 #f #p #I #V1 #V2 #T1 #T2 #_ #_ #_ #_ #H elim (simple_inv_bind … H)
 qed-.