X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fnat%2Ftotient.ma;h=2c6061e0b80c673158812a259d0e944280d0a8f6;hb=ff5659b6ee47292a33c84b0889b5d66d729397f6;hp=24c3920ed82571324c2977a7be798b492fbf43e7;hpb=55b82bd235d82ff7f0a40d980effe1efde1f5073;p=helm.git

diff --git a/helm/software/matita/library/nat/totient.ma b/helm/software/matita/library/nat/totient.ma
index 24c3920ed..2c6061e0b 100644
--- a/helm/software/matita/library/nat/totient.ma
+++ b/helm/software/matita/library/nat/totient.ma
@@ -44,8 +44,7 @@ apply (count_times m m2 ? ? ?
 intros.unfold cr_pair.
 apply (le_to_lt_to_lt ? (pred ((S m)*(S m2)))).
 unfold min.
-apply le_min_aux_r.
-change with ((S (pred ((S m)*(S m2)))) \le ((S m)*(S m2))).
+apply le_min_aux_r.unfold lt.
 apply (nat_case ((S m)*(S m2))).apply le_n.
 intro.apply le_n.
 intros.