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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_uni.ma".
16 include "ground/relocation/pr_isi_id.ma".
17
18 (* IDENTITY CONDITION FOR PARTIAL RELOCATION MAPS ***************************)
19
20 (* Constructions with pr_isi ************************************************)
21
22 (*** uni_inv_isid uni_isi *)
23 lemma pr_uni_isi (f): đŽâ¨đŸŽâŠ â‰Ą f â†’ đˆâ¨f❊.
24 /2 width=1 by pr_eq_id_isi/ qed.
25
26 (* Inversions with pr_isi ***************************************************)
27
28 (*** uni_isid isi_inv_uni *)
29 lemma pr_isi_inv_uni (f): đˆâ¨f❊ â†’ đŽâ¨đŸŽâŠ â‰Ą f.
30 /2 width=1 by pr_isi_inv_eq_id/ qed-.