+++ /dev/null
-(**************************************************************************)
-(* ___ *)
-(* ||M|| *)
-(* ||A|| A project by Andrea Asperti *)
-(* ||T|| *)
-(* ||I|| Developers: *)
-(* ||T|| The HELM team. *)
-(* ||A|| http://helm.cs.unibo.it *)
-(* \ / *)
-(* \ / This file is distributed under the terms of the *)
-(* v GNU General Public License Version 2 *)
-(* *)
-(**************************************************************************)
-
-include "basic_2/syntax/term_weight.ma".
-include "basic_2/syntax/bind.ma".
-
-(* WEIGHT OF A BINDER FOR LOCAL ENVIRONMENTS *******************************)
-
-rec definition bw I ≝ match I with
-[ BUnit _ ⇒ 1
-| BPair _ V ⇒ ♯{V}
-].
-
-interpretation "weight (binder for local environments)" 'Weight I = (bw I).
-
-(* Basic properties *********************************************************)
-
-lemma bw_pos: ∀I. 1 ≤ ♯{I}.
-* //
-qed.