1 (**************************************************************************)
4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
13 (**************************************************************************)
15 include "ground/relocation/gr_id.ma".
16 include "ground/relocation/gr_isi_eq.ma".
18 (* IDENTITY CONDITION FOR GENERIC RELOCATION MAPS ***********************************************************)
20 (* Properties with gr_id *********************************************************)
23 lemma gr_isi_id: đâŞđ˘âŤ.
24 /2 width=1 by gr_eq_push_isi/ qed.
26 (* Alternative definition with gr_id and gr_eq *******************************************)
29 lemma gr_eq_id_isi (f): đ˘ ⥠f â đâŞfâŤ.
30 /2 width=3 by gr_isi_eq_repl_back/ qed.
32 (*** eq_id_inv_isid *)
33 lemma gr_isi_inv_eq_id (f): đâŞf⍠â đ˘ ⥠f.
34 /2 width=1 by gr_isi_inv_eq_repl/ qed-.