Generalized derivations with power values in rings and Banach algebras

Document Type : Original Article

Author

Department of Mathematics, Chuzhou University, Chuzhou 239012, PR China

http://dx.doi.org/10.1016/j.joems.2013.01.001

Abstract

Let R be a 2-torsion-free prime ring with center Z(R), F a generalized derivation associated
with a nonzero derivation d, L a Lie ideal of R. If ðdðuÞl1FðuÞl2dðuÞl3FðuÞl4 . . . FðuÞlk Þn ¼ 0 for all
u 2 L, where l1, l2, . . . , lk are fixed non-negative integers not all zero, and n is fixed positive integer,
then L ˝ Z(R). We also examine the case when R is a semiprime ring. Finally, we apply the above
result to Banach algebras.

Keywords