--- /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/relocation/pr_eq.ma".
+include "ground/relocation/pr_nexts.ma".
+
+(* ITERATED NEXT FOR PARTIAL RELOCATION MAPS ********************************)
+
+(* Constructions with pr_eq *************************************************)
+
+(*** nexts_eq_repl *)
+lemma pr_nexts_eq_repl (n):
+ pr_eq_repl (λf1,f2. ↑*[n] f1 ≡ ↑*[n] f2).
+#n @(nat_ind_succ … n) -n
+/3 width=5 by pr_eq_next/
+qed.