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International Journal of Mathematics and Mathematical Sciences
Volume 2005 (2005), Issue 7, Pages 1031-1038

Identities with derivations and automorphisms on semiprime rings

Department of Mathematics, Faculty of Education, University of Maribor, Koroška cesta 160, Maribor 2000, Slovenia

Received 31 May 2004; Revised 17 January 2005

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The purpose of this paper is to investigate identities with derivations and automorphisms on semiprime rings. A classical result of Posner states that the existence of a nonzero centralizing derivation on a prime ring forces the ring to be commutative. Mayne proved that in case there exists a nontrivial centralizing automorphism on a prime ring, then the ring is commutative. In this paper, some results related to Posner's theorem as well as to Mayne's theorem are proved.