Posner's second theorem with two variable σ-derivations

This study is an attempt to prove the following result: Suppose that R is a 2-torsion free prime ring and Φ:R×R→R is a left two variable σ-derivation such that σ is a monomorphism, Φ(R×R)⊆σ(R), and [σ(b) − b, x] = 0 for all b∈I and x∈R, where I is an arbitrary fixed non-zero ideal of R. Moreover, as...

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Bibliographic Details
Main Author: Amin Hosseini
Format: Article
Language:English
Published: Taylor & Francis Group 2017-03-01
Series:Journal of Taibah University for Science
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S165836551630005X
Description
Summary:This study is an attempt to prove the following result: Suppose that R is a 2-torsion free prime ring and Φ:R×R→R is a left two variable σ-derivation such that σ is a monomorphism, Φ(R×R)⊆σ(R), and [σ(b) − b, x] = 0 for all b∈I and x∈R, where I is an arbitrary fixed non-zero ideal of R. Moreover, assume that I⊆σ(I) or σ(I) is an ideal of R. If [σ(a),Φ(a,x)]∈Z(R) for all a∈I and x∈R, then either R is commutative or Φ is zero.
ISSN:1658-3655