matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight_bind.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                  *)
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  13 (**************************************************************************)
  14
  15 include "basic_2/syntax/bind_weight.ma".
  16 include "basic_2/relocation/lifts_weight.ma".
  17 include "basic_2/relocation/lifts_bind.ma".
  18
  19 (* GENERIC RELOCATION FOR BINDERS *******************************************)
  20
  21 (* Forward lemmas with weight for binders ***********************************)
  22
  23 lemma liftsb_fwd_bw: ∀f,I1,I2. ⬆*[f] I1 ≘ I2 → ♯{I1} = ♯{I2}.
  24 #f #I1 #I2 * -I1 -I2 /2 width=2 by lifts_fwd_tw/
  25 qed-.