rec definition lw L ≝ match L with
[ LAtom ⇒ 0
-| LBind L I ⇒ lw L + ♯{I}
+| LBind L I ⇒ lw L + ♯❨I❩
].
interpretation "weight (local environment)" 'Weight L = (lw L).
(* Basic properties *********************************************************)
(* Basic_2A1: uses: lw_pair *)
-lemma lw_bind: ∀I,L. ♯{L} < ♯{L.ⓘ{I}}.
+lemma lw_bind: ∀I,L. ♯❨L❩ < ♯❨L.ⓘ[I]❩.
normalize /2 width=1 by monotonic_le_plus_r/ qed.
(* Basic_1: removed theorems 4: clt_cong clt_head clt_thead clt_wf_ind *)