X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Funfold%2Fdelift_lift.ma;h=a02d3db2cac92bddfe9b0c9fac3c68e2036f28a2;hb=48b202cd4ccd3ffc10f9a134314f747fdee30d36;hp=e725d65da31d9f110b833ccb67b4ffac4109fe03;hpb=39e80f80b26e18cf78f805e814ba2f2e8400c1f1;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/unfold/delift_lift.ma b/matita/matita/contribs/lambda_delta/Basic_2/unfold/delift_lift.ma
index e725d65da..a02d3db2c 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/unfold/delift_lift.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/unfold/delift_lift.ma
@@ -31,7 +31,7 @@ qed-.
 
 lemma delift_fwd_lref1_be: ∀L,U2,d,e,i. L ⊢ #i [d, e] ≡ U2 →
                            d ≤ i → i < d + e →
-                           ∃∃K,V1,V2. ⇩[0, i] L ≡ K. 𝕓{Abbr} V1 &
+                           ∃∃K,V1,V2. ⇩[0, i] L ≡ K. ⓓV1 &
                                       K ⊢ V1 [0, d + e - i - 1] ≡ V2 &
                                       ⇧[0, d] V2 ≡ U2.
 #L #U2 #d #e #i * #U #HU #HU2 #Hdi #Hide