X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda%2Flift.ma;h=17ea9692b308a34acc90ea21dffde747f5205d66;hb=5ca47b58902b9f2583ad1354b860c04ea62df46c;hp=60038de76ffdc506c75545c0464e1543aae28a22;hpb=cdcfe9f97936f02dab1970ebf3911940bf0a4e29;p=helm.git

diff --git a/matita/matita/contribs/lambda/lift.ma b/matita/matita/contribs/lambda/lift.ma
index 60038de76..17ea9692b 100644
--- a/matita/matita/contribs/lambda/lift.ma
+++ b/matita/matita/contribs/lambda/lift.ma
@@ -16,8 +16,8 @@ include "term.ma".
 
 (* RELOCATION ***************************************************************)
 
-(* Policy: depth (level) metavariables: d, e
-           height metavariables       : h, k
+(* Policy: level metavariables : d, e
+           height metavariables: h, k
 *)
 (* Note: indexes start at zero *)
 let rec lift h d M on M ≝ match M with
@@ -48,12 +48,12 @@ lemma lift_vref_ge: ∀d,h,i. d ≤ i → ↑[d, h] #i = #(i+h).
 #d #h #i #H elim (le_to_or_lt_eq … H) -H
 normalize // /3 width=1/
 qed.
-
+(*
 lemma lift_vref_pred: ∀d,i. d < i → ↑[d, 1] #(i-1) = #i.
 #d #i #Hdi >lift_vref_ge /2 width=1/
 <plus_minus_m_m // /2 width=2/ 
 qed.
-
+*)
 lemma lift_id: ∀M,d. ↑[d, 0] M = M.
 #M elim M -M
 [ #i #d elim (lt_or_ge i d) /2 width=1/
@@ -260,13 +260,15 @@ qed-.
 
 lemma lstar_liftable: ∀T,R. (∀t. liftable (R t)) →
                       ∀l. liftable (lstar T … R l).
-#T #R #HR #l #h #M1 #M2 #H elim H -l -M1 -M2 // /3 width=3/
+#T #R #HR #l #h #M1 #M2 #H
+@(lstar_ind_l ????????? H) -l -M1 // /3 width=3/
 qed.
 
 lemma lstar_deliftable_sn: ∀T,R. (∀t. deliftable_sn (R t)) →
                            ∀l. deliftable_sn (lstar T … R l).
-#T #R #HR #l #h #N1 #N2 #H elim H -l -N1 -N2 /2 width=3/
-#t #N1 #N #HN1 #l #N2 #_ #IHN2 #d #M1 #HMN1
+#T #R #HR #l #h #N1 #N2 #H
+@(lstar_ind_l ????????? H) -l -N1 /2 width=3/
+#t #l #N1 #N #HN1 #_ #IHN2 #d #M1 #HMN1
 elim (HR … HN1 … HMN1) -N1 #M #HM1 #HMN
 elim (IHN2 … HMN) -N /3 width=3/
 qed-.