- advances on hereditarily free variables: now "frees" is primitive

[helm.git] / matita / matita / contribs / lambdadelta / basic_2 / substitution / cpys_cpys.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_cpys.ma b/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_cpys.ma
index 52759ca7f3f0d123609af0c23f063b507e639e3b..c571d9991b8263cd618cfae19c97faf43e2cf93c 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_cpys.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/substitution/cpys_cpys.ma
@@ -103,7 +103,7 @@ theorem cpys_antisym_eq: ∀G,L1,T1,T2,d,e. ⦃G, L1⦄ ⊢ T1 ▶*[d, e] T2 →
     lapply (cpys_weak … HW2 0 (i+1) ? ?) -HW2 //
     [ >yplus_O1 >yplus_O1 /3 width=1 by ylt_fwd_le, ylt_inj/ ] -Hi
     #HW2 >(cpys_inv_lift1_eq … HW2) -HW2 //
-  | elim (ldrop_O1_le … Hi) -Hi #K2 #HLK2
+  | elim (ldrop_O1_le (Ⓕ) … Hi) -Hi #K2 #HLK2
     elim (cpys_inv_lift1_ge_up … HW2 … HLK2 … HVW2 ? ? ?) -HW2 -HLK2 -HVW2
     /2 width=1 by ylt_fwd_le_succ, yle_succ_dx/ -Hdi -Hide
     #X #_ #H elim (lift_inv_lref2_be … H) -H //