X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Fsubstitution%2Fldrop_ldrop.ma;fp=matita%2Fmatita%2Fcontribs%2Flambda_delta%2FBasic_2%2Fsubstitution%2Fldrop_ldrop.ma;h=3aef19c0eb3c31feab2ad31b3bb03619e1a64be9;hb=9aa9a54946719d3fdb4cadb7c7d33fd13956c083;hp=f4b20bcb594ab4fbf93f5a2cc4d0bc9dc650289e;hpb=db63f65c35efaa93d0a2cc00a194549e791975c9;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/Basic_2/substitution/ldrop_ldrop.ma b/matita/matita/contribs/lambda_delta/Basic_2/substitution/ldrop_ldrop.ma
index f4b20bcb5..3aef19c0e 100644
--- a/matita/matita/contribs/lambda_delta/Basic_2/substitution/ldrop_ldrop.ma
+++ b/matita/matita/contribs/lambda_delta/Basic_2/substitution/ldrop_ldrop.ma
@@ -46,7 +46,7 @@ theorem ldrop_conf_ge: ∀d1,e1,L,L1. ↓[d1, e1] L ≡ L1 →
 | //
 | #L #K #I #V #e #_ #IHLK #e2 #L2 #H #He2
   lapply (ldrop_inv_ldrop1 … H ?) -H /2 width=2/ #HL2
-  <minus_plus_comm /3 width=1/
+  <minus_plus >minus_minus_comm /3 width=1/
 | #L #K #I #V1 #V2 #d #e #_ #_ #IHLK #e2 #L2 #H #Hdee2
   lapply (transitive_le 1 … Hdee2) // #He2
   lapply (ldrop_inv_ldrop1 … H ?) -H // -He2 #HL2
@@ -85,9 +85,9 @@ theorem ldrop_trans_le: ∀d1,e1,L1,L. ↓[d1, e1] L1 ≡ L →
 [ #d #e #e2 #L2 #H
   >(ldrop_inv_atom1 … H) -L2 /2 width=3/
 | #K #I #V #e2 #L2 #HL2 #H
-  lapply (le_O_to_eq_O … H) -H #H destruct /2 width=3/
+  lapply (le_n_O_to_eq … H) -H #H destruct /2 width=3/
 | #L1 #L2 #I #V #e #_ #IHL12 #e2 #L #HL2 #H
-  lapply (le_O_to_eq_O … H) -H #H destruct
+  lapply (le_n_O_to_eq … H) -H #H destruct
   elim (IHL12 … HL2 ?) -IHL12 -HL2 // #L0 #H #HL0
   lapply (ldrop_inv_refl … H) -H #H destruct /3 width=5/
 | #L1 #L2 #I #V1 #V2 #d #e #HL12 #HV12 #IHL12 #e2 #L #H #He2d