matita/matita/contribs/lambdadelta/delayed_updating/etc/relocation/sbr_push.etc

   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/tr_map.ma".
  16 include "delayed_updating/notation/functions/upspoonverticalbar_2.ma".
  17
  18 (* PUSH FOR STACKS OF BASIC RELOCATION MAPS *********************************)
  19
  20 definition sbr_push (p:pnat) (f): tr_map ≝ (↑p)⨮f.
  21
  22 interpretation
  23   "push (stack of basic relocation maps)"
  24   'UpSpoonVerticalBar n f = (sbr_push n f).
  25
  26 (* Basic properties *********************************************************)
  27
  28 lemma sbr_push_unfold (p) (f):
  29       (↑p)⨮f = p⫯❘f.
  30 // qed.