X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fnlibrary%2Fdatatypes%2Flist.ma;h=4188bb2883c3a625213268f10a989d86f99a555a;hb=1092af803d3d1a9788008d8abf6c7470d68f22c7;hp=0e13377257e180b4a8505741618bd76ed7b86216;hpb=edccb29109d07b54b48230a280f4351ed042dd9f;p=helm.git

diff --git a/helm/software/matita/nlibrary/datatypes/list.ma b/helm/software/matita/nlibrary/datatypes/list.ma
index 0e1337725..4188bb288 100644
--- a/helm/software/matita/nlibrary/datatypes/list.ma
+++ b/helm/software/matita/nlibrary/datatypes/list.ma
@@ -35,7 +35,7 @@ interpretation "cons" 'cons hd tl = (cons ? hd tl).
 
 ntheorem nil_cons:
   ∀A:Type[0].∀l:list A.∀a:A. a::l ≠ [].
-#A;#l;#a;#H;ndestruct;
+#A;#l;#a; @; #H; ndestruct;
 nqed.
 
 nlet rec id_list A (l: list A) on l ≝