X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Fsyntax%2Fcl_restricted_weight.ma;h=5af875355721a104bd64303e68aa8c90adcb3119;hp=32fd7733150f946deb2d24ab4ac048968a91cb11;hb=222044da28742b24584549ba86b1805a87def070;hpb=09b4420070d6a71990e16211e499b51dbb0742cb

diff --git a/matita/matita/contribs/lambdadelta/basic_2/syntax/cl_restricted_weight.ma b/matita/matita/contribs/lambdadelta/basic_2/syntax/cl_restricted_weight.ma
index 32fd77331..5af875355 100644
--- a/matita/matita/contribs/lambdadelta/basic_2/syntax/cl_restricted_weight.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2/syntax/cl_restricted_weight.ma
@@ -28,6 +28,10 @@ lemma rfw_shift: ∀p,I,K,V,T. ♯{K.ⓑ{I}V, T} < ♯{K, ⓑ{p,I}V.T}.
 normalize /2 width=1 by monotonic_le_plus_r/
 qed.
 
+lemma rfw_clear: ∀p,I1,I2,K,V,T. ♯{K.ⓤ{I1}, T} < ♯{K, ⓑ{p,I2}V.T}.
+normalize /4 width=1 by monotonic_le_plus_r, le_S_S/
+qed.
+
 lemma rfw_tpair_sn: ∀I,L,V,T. ♯{L, V} < ♯{L, ②{I}V.T}.
 normalize in ⊢ (?→?→?→?→?%%); //
 qed.