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 *)
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15 include "ground/notation/functions/droppred_1.ma".
16 include "ground/lib/stream_hdtl.ma".
17 include "ground/relocation/gr_map.ma".
19 (* TAIL FOR GENERIC RELOCATION MAPS ***********************************************************)
22 definition gr_tl (f): gr_map ≝ ⫰f.
25 "tail (generic relocation maps)"
26 'DropPred f = (gr_tl f).
28 (* Basic properties *********************************************************)
31 lemma gr_tl_push (f): f = ⫱⫯f.
35 lemma gr_tl_next (f): f = ⫱↑f.
38 (* Basic eliminators ********************************************************)
40 (*** pn_split gr_map_split *)
41 lemma gr_map_split_tl (f): ∨∨ ⫯⫱f = f | ↑⫱f = f.
42 * * /2 width=1 by or_introl, or_intror/