--- /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 "ground/notation/functions/append_2.ma".
+include "ground/relocation/mr2.ma".
+
+(* MULTIPLE RELOCATION WITH PAIRS *******************************************)
+
+let rec mr2_append cs1 cs2 on cs1 ≝
+ match cs1 with
+ [ nil2 ⇒ cs2
+ | cons2 l m cs1 ⇒ ❨l, m❩; mr2_append cs1 cs2
+ ].
+
+interpretation "append (multiple relocation with pairs)"
+ 'Append cs1 cs2 = (mr2_append cs1 cs2).
+
+(* Basic properties *********************************************************)
+
+lemma mr2_append_nil (cs2): cs2 = ◊ @@ cs2.
+// qed.
+
+lemma mr2_append_cons (l) (m) (cs1) (cs2):
+ ❨l, m❩; (cs1 @@ cs2) = (❨l, m❩; cs1) @@ cs2.
+// qed.