src/ZF/Perm.thy

--- a/src/ZF/Perm.thy	Sun Nov 02 16:09:35 2014 +0100
+++ b/src/ZF/Perm.thy	Sun Nov 02 16:39:54 2014 +0100
@@ -8,7 +8,7 @@
   -- Lemmas for the Schroeder-Bernstein Theorem
 *)
 
-header{*Injections, Surjections, Bijections, Composition*}
+section{*Injections, Surjections, Bijections, Composition*}
 
 theory Perm imports func begin