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src/HOL/Algebra/RingHom.thy
changeset 35849 b5522b51cb1e
parent 30729 461ee3e49ad3
child 44655 fe0365331566 
--- a/src/HOL/Algebra/RingHom.thy	Sun Mar 21 16:51:37 2010 +0100
+++ b/src/HOL/Algebra/RingHom.thy	Sun Mar 21 17:12:31 2010 +0100
@@ -1,6 +1,5 @@
-(*
-  Title:     HOL/Algebra/RingHom.thy
-  Author:    Stephan Hohe, TU Muenchen
+(*  Title:      HOL/Algebra/RingHom.thy
+    Author:     Stephan Hohe, TU Muenchen
 *)
 
 theory RingHom
@@ -100,6 +99,7 @@
     (rule R.is_cring, rule S.is_cring, rule homh)
 qed
 
+
 subsection {* The Kernel of a Ring Homomorphism *}
 
 --"the kernel of a ring homomorphism is an ideal"
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