]> matita.cs.unibo.it Git - helm.git/blob - matita/matita/contribs/lambdadelta/basic_2/relocation/lifts_weight.ma
basic_2: stronger supclosure allows better inversion lemmas
[helm.git] / matita / matita / contribs / lambdadelta / basic_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 "basic_2/grammar/term_weight.ma".
16 include "basic_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-.