X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Fpermutation.ma;h=5d6e5cf1e953ca73cbe7d20f9347c4175a19c009;hb=5f6a2cf7134fda213ffc721ee7eebf5be30d7800;hp=209c0c12e2744783f644ac5c023b8e5c7bf0f62e;hpb=ff5d15158c83a1f45d78daf99f22de83aed3eab0;p=helm.git

diff --git a/helm/software/matita/library/nat/permutation.ma b/helm/software/matita/library/nat/permutation.ma
index 209c0c12e..5d6e5cf1e 100644
--- a/helm/software/matita/library/nat/permutation.ma
+++ b/helm/software/matita/library/nat/permutation.ma
@@ -620,7 +620,7 @@ apply le_S.apply le_n.assumption.
 apply (trans_eq ? ? (map_iter_i (S k) (\lambda m. g 
 (transpose i (S(m1 + i)) (transpose (S(m1 + i)) (S(S(m1 + i))) m))) f n)).
 apply (H2 O ? ? (S(m1+i))).
-unfold lt.apply le_S_S.apply le_O_n.
+unfold lt.apply le_S_S.apply le_O_n.id.
 apply (trans_le ? i).assumption.
 change with (i \le (S m1)+i).apply le_plus_n.
 exact H4.