X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground_2%2Fxoa_props.ma;h=06bfbc739b7f091f55555fd45c6bff315ff7f42a;hb=efff5b0361797c9eb4c5ac8acc75488d3cf2ccb7;hp=71216d1c4dee1cc0795580468c082e67dfb47473;hpb=e8998d29ab83e7b6aa495a079193705b2f6743d3;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground_2/xoa_props.ma b/matita/matita/contribs/lambdadelta/ground_2/xoa_props.ma
index 71216d1c4..06bfbc739 100644
--- a/matita/matita/contribs/lambdadelta/ground_2/xoa_props.ma
+++ b/matita/matita/contribs/lambdadelta/ground_2/xoa_props.ma
@@ -19,7 +19,3 @@ include "ground_2/xoa.ma".
 interpretation "logical false" 'false = False.
 
 interpretation "logical true" 'true = True.
-
-lemma ex2_1_comm: ∀A0. ∀P0,P1:A0→Prop. (∃∃x0. P0 x0 & P1 x0) → ∃∃x0. P1 x0 & P0 x0.
-#A0 #P0 #P1 * /2 width=3/
-qed.