X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Funfold%2Fldrops.ma;h=28b9a8c7e7787ed1751a8814c0eb2d14b01ef069;hb=011cf6478141e69822a5b40933f2444d0522532f;hp=d271fe2c616ac487848a3e5217ddbd4af1f5c727;hpb=ca9cf24217384150ed1474dacba7b7dbb8836dbf;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/unfold/ldrops.ma b/matita/matita/contribs/lambda_delta/Basic_2/unfold/ldrops.ma
index d271fe2c6..28b9a8c7e 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/unfold/ldrops.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/unfold/ldrops.ma
@@ -34,6 +34,7 @@ fact ldrops_inv_nil_aux: ∀L1,L2,des. ⇩*[des] L1 ≡ L2 → des = ⟠ → L1
 #L1 #L #L2 #d #e #des #_ #_ #H destruct
 qed.
 
+(* Basic_1: was: drop1_gen_pnil *)
 lemma ldrops_inv_nil: ∀L1,L2. ⇩*[⟠] L1 ≡ L2 → L1 = L2.
 /2 width=3/ qed-.
 
@@ -46,6 +47,7 @@ fact ldrops_inv_cons_aux: ∀L1,L2,des. ⇩*[des] L1 ≡ L2 →
   /2 width=3/
 qed.
 
+(* Basic_1: was: drop1_gen_pcons *)
 lemma ldrops_inv_cons: ∀L1,L2,d,e,des. ⇩*[{d, e} :: des] L1 ≡ L2 →
                        ∃∃L. ⇩*[des] L1 ≡ L & ⇩[d, e] L ≡ L2.
 /2 width=3/ qed-.
@@ -73,6 +75,7 @@ qed-.
 
 (* Basic properties *********************************************************)
 
+(* Basic_1: was: drop1_skip_bind *)
 lemma ldrops_skip: ∀L1,L2,des. ⇩*[des] L1 ≡ L2 → ∀V1,V2. ⇧*[des] V2 ≡ V1 →
                    ∀I. ⇩*[des + 1] L1. ⓑ{I} V1 ≡ L2. ⓑ{I} V2.
 #L1 #L2 #des #H elim H -L1 -L2 -des