matita/matita/contribs/lambdadelta/static_2/relocation/lifts_weight.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 "static_2/syntax/term_weight.ma".
  16 include "static_2/relocation/lifts.ma".
  17
  18 (* GENERIC RELOCATION FOR TERMS *********************************************)
  19
  20 (* Forward lemmas with weight for terms *************************************)
  21
  22 (* Basic_2A1: includes: lift_fwd_tw *)
  23 lemma lifts_fwd_tw: ∀f,T1,T2. ⬆*[f] T1 ≘ T2 → ♯{T1} = ♯{T2}.
  24 #f #T1 #T2 #H elim H -f -T1 -T2 normalize //
  25 qed-.