+++ /dev/null
-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-include "basic_2/syntax/ceq_ext.ma".
-
-(* CONTEXT-AWARE SYNTACTIC EQUIVALENCE FOR BINDERS **************************)
-
-(* Main properties **********************************************************)
-
-theorem ceq_ext_trans: ∀L1,I1,I. ceq_ext L1 I1 I →
- ∀L2,I2. ceq_ext L2 I I2 → ∀L3. ceq_ext L3 I1 I2.
-#L1 #I1 #I * -I1 -I //
-#I1 #V1 #V #HV1 #L2 #Z #H elim (ext2_inv_pair_sn … H) -H //
-qed-.