]> matita.cs.unibo.it Git - helm.git/blob - matita/matita/contribs/lambdadelta/ground/relocation/gr_isf_tls.ma
update in ground and static_2
[helm.git] / matita / matita / contribs / lambdadelta / ground / relocation / gr_isf_tls.ma
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/gr_tls.ma".
16 include "ground/relocation/gr_isf_tl.ma".
17
18 (* FINITE COLENGTH CONDITION FOR GENERIC RELOCATION MAPS ********************)
19
20 (* Constructions with gr_tls ************************************************)
21
22 lemma gr_isf_tls (n) (f): 𝐅❪f❫ → 𝐅❪⫰*[n]f❫.
23 #n @(nat_ind_succ … n) -n /3 width=1 by gr_isf_tl/
24 qed.
25
26 (* Inversions with gr_tls ***************************************************)
27
28 (*** isfin_inv_tls *)
29 lemma gr_isf_inv_tls (n) (g): 𝐅❪⫰*[n]g❫ → 𝐅❪g❫.
30 #n @(nat_ind_succ … n) -n /3 width=1 by gr_isf_inv_tl/
31 qed-.