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1 (**************************************************************************)
2 (*       ___                                                              *)
3 (*      ||M||                                                             *)
4 (*      ||A||       A project by Andrea Asperti                           *)
5 (*      ||T||                                                             *)
6 (*      ||I||       Developers:                                           *)
7 (*      ||T||         The HELM team.                                      *)
8 (*      ||A||         http://helm.cs.unibo.it                             *)
9 (*      \   /                                                             *)
10 (*       \ /        This file is distributed under the terms of the       *)
11 (*        v         GNU General Public License Version 2                  *)
12 (*                                                                        *)
13 (**************************************************************************)
14
15 include "ground/relocation/pr_pushs.ma".
16 include "ground/relocation/pr_tls.ma".
17
18 (* ITERATED TAIL FOR PARTIAL RELOCATION MAPS ********************************)
19
20 (* Constructions with pr_pushs **********************************************)
21
22 (*** tls_pushs *)
23 lemma pr_tls_pushs (n) (f): f = ⫰*[n] ⫯*[n] f.
24 #n @(nat_ind_succ … n) -n //
25 #n #IH #f <pr_tls_swap <pr_pushs_succ <pr_tl_push //
26 qed.