X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fdelayed_updating%2Fsyntax%2Fpath_closed_structure.ma;h=ab812e9b2cf9bdcfb39f19e84ad6a8c41728a9b0;hb=HEAD;hp=99b0a9235581d1321d21b67e1b306c193341c92a;hpb=797a607af83f82102033270087722a7e59ddcd17;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_closed_structure.ma b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_closed_structure.ma
index 99b0a9235..ab812e9b2 100644
--- a/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_closed_structure.ma
+++ b/matita/matita/contribs/lambdadelta/delayed_updating/syntax/path_closed_structure.ma
@@ -20,8 +20,8 @@ include "delayed_updating/syntax/path_depth.ma".
 
 (* Constructions with structure *********************************************)
 
-lemma path_closed_structure_depth (p):
-      ⊗p ϵ 𝐂❨♭p❩.
-#p elim p -p // *
+lemma path_closed_structure_depth (o) (p):
+      ⊗p ϵ 𝐂❨o,♭p,𝟎❩.
+#o #p elim p -p // *
 /2 width=1 by pcc_L_dx, pcc_A_dx, pcc_S_dx/
 qed.