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 *)
13 (**************************************************************************)
15 include "static_2/static/reqg_length.ma".
16 include "static_2/static/feqg.ma".
18 (* GENERIC EQUIVALENCE FOR CLOSURES ON REFERRED ENTRIES *********************)
20 (* Forward lemmas with length for local environments ************************)
22 lemma feqg_fwd_length (S) (G1) (G2) (L1) (L2) (T1) (T2):
23 ❨G1,L1,T1❩ ≛[S] ❨G2,L2,T2❩ → |L1| = |L2|.
24 /3 width=6 by feqg_fwd_reqg_sn, reqg_fwd_length/ qed-.