+(**************************************************************************)
+(* ___ *)
+(* ||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 "ground/relocation/tr_id_pap.ma".
+include "ground/relocation/tr_compose_pap.ma".
+include "ground/relocation/tr_pap_eq.ma".
+
+(* IDENTITY ELEMENT FOR TOTAL RELOCATION MAPS *******************************)
+
+(* Coonstructions with tr_compose *******************************************)
+
+lemma tr_compose_id_sn (f):
+ f ā š¢āf.
+#f @nstream_eq_inv_ext #q //
+qed.
+
+lemma tr_compose_id_dx (f):
+ f ā fāš¢.
+#f @nstream_eq_inv_ext #q //
+qed.