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=26c4e3e8a6e27cdcd704685a1622acce0b194b61;hb=439b6ec33d749ba4e6ae0938e973a85bc23e306e;hp=9fe72f82dd696ed4bb55dee57a1d351dcaa14194;hpb=5ea90cbbb01fe0bf3b77221d9e6c87002982621f;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 9fe72f82d..26c4e3e8a 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
@@ -47,7 +47,7 @@ fact sfr_delift_aux: ∀L,T,T1,d,e. d + e ≤ |L| → ≽ [d, e] L → T = T1 
   elim (IH … HKL … HK ?) -IH -HKL -HK
   [3: // |2: skip |4: >H -H /2 width=1/ ] -Hde -H #V2 #V12 (**) (* H erased two times *)
   elim (lift_total V2 0 d) /3 width=7/
-| #I #V1 #T1 #d #e #Hde #HL #H destruct
+| #a #I #V1 #T1 #d #e #Hde #HL #H destruct
   elim (IH … V1 … Hde HL ?) [2,4: // |3: skip ] #V2 #HV12
   elim (IH (L.ⓑ{I}V1) T1 ? ? (d+1) e ? ? ?) -IH [3,6: // |2: skip |4,5: /2 width=1/ ] -Hde -HL #T2 #HT12
   lapply (delift_lsubs_trans … HT12 (L.ⓑ{I}V2) ?) -HT12 /2 width=1/ /3 width=4/