X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fsyntax%2Fgenv_weight.ma;h=6cda4db4fb17cefe5970813ba177f539459ff86a;hb=156d974ad89aa04a086fdf9d332c8b04adf279fd;hp=9bf005fa069ebc515ff1589a56fc9b9e43b78209;hpb=ff612dc35167ec0c145864c9aa8ae5e1ebe20a48;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/syntax/genv_weight.ma b/matita/matita/contribs/lambdadelta/static_2/syntax/genv_weight.ma
index 9bf005fa0..6cda4db4f 100644
--- a/matita/matita/contribs/lambdadelta/static_2/syntax/genv_weight.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/syntax/genv_weight.ma
@@ -18,13 +18,19 @@ include "static_2/syntax/genv.ma".
 (* WEIGHT OF A GLOBAL ENVIRONMENT *******************************************)
 
 rec definition gw G ≝ match G with
-[ GAtom       ⇒ 0
-| GPair G I T ⇒ gw G + ♯{T}
+[ GAtom       ⇒ 𝟏
+| GPair G I T ⇒ gw G + ♯❨T❩
 ].
 
 interpretation "weight (global environment)" 'Weight G = (gw G).
 
 (* Basic properties *********************************************************)
 
-lemma gw_pair: ∀I,G,T. ♯{G} < ♯{G.ⓑ{I}T}.
-normalize /2 width=1 by monotonic_le_plus_r/ qed.
+lemma gw_atom_unfold: 𝟏 = ♯❨⋆❩.
+// qed.
+
+lemma gw_pair_unfold (I) (G) (T): ♯❨G❩ + ♯❨T❩ = ♯❨G.ⓑ[I]T❩.
+// qed.
+
+lemma gw_pair: ∀I,G,T. ♯❨G❩ < ♯❨G.ⓑ[I]T❩.
+// qed.