--- /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/element_u_1.ma".
+include "ground/relocation/gr_nexts.ma".
+include "ground/relocation/gr_id.ma".
+
+(* UNIFORM ELEMENTS FOR GENERIC RELOCATION MAPS ***********************************************************)
+
+(*** uni *)
+definition gr_uni (n) ā ā*[n] š¢.
+
+interpretation
+ "uniform elements (generic relocation maps)"
+ 'ElementU n = (gr_uni n).
+
+(* Basic properties *********************************************************)
+
+(*** uni_zero *)
+lemma gr_uni_zero: š¢ = š®āØšā©.
+// qed.
+
+(*** uni_succ *)
+lemma gr_uni_succ (n): āš®āØnā© = š®āØānā©.
+/2 width=1 by gr_nexts_succ/ qed.