X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=matita%2Flibrary%2Fnat%2Fpermutation.ma;h=5d6e5cf1e953ca73cbe7d20f9347c4175a19c009;hb=11c50230046ab06ad542aa2f441d7525edbb678d;hp=209c0c12e2744783f644ac5c023b8e5c7bf0f62e;hpb=6d5f1a19aaa18813dca94b4e2e7e5ee3b97b4e4b;p=helm.git

diff --git a/matita/library/nat/permutation.ma b/matita/library/nat/permutation.ma
index 209c0c12e..5d6e5cf1e 100644
--- a/matita/library/nat/permutation.ma
+++ b/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.