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 *)
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15 include "basic_2/grammar/lenv_weight.ma".
16 include "basic_2/grammar/cl_shift.ma".
18 (* WEIGHT OF A CLOSURE ******************************************************)
20 definition fw: lenv → term → ? ≝ λL,T. ♯{L} + ♯{T}.
22 interpretation "weight (closure)" 'Weight L T = (fw L T).
24 (* Basic properties *********************************************************)
26 (* Basic_1: was: flt_shift *)
27 lemma fw_shift: ∀a,K,I,V,T. ♯{K. ⓑ{I} V, T} < ♯{K, ⓑ{a,I} V. T}.
31 lemma fw_tpair_sn: ∀I,L,V,T. ♯{L, V} < ♯{L, ②{I}V.T}.
32 normalize in ⊢ (?→?→?→?→?%%); //
35 lemma fw_tpair_dx: ∀I,L,V,T. ♯{L, T} < ♯{L, ②{I}V.T}.
36 normalize in ⊢ (?→?→?→?→?%%); //
39 lemma fw_lpair_sn: ∀I,L,V,T. ♯{L, V} < ♯{L.ⓑ{I}V, T}.
40 normalize /3 width=1 by monotonic_lt_plus_l, monotonic_le_plus_r/ (**) (* auto too slow without trace *)
43 (* Basic_1: removed theorems 7:
44 flt_thead_sx flt_thead_dx flt_trans
45 flt_arith0 flt_arith1 flt_arith2 flt_wf_ind
47 (* Basic_1: removed local theorems 1: q_ind *)