Strong commutativity preserving generalized derivations on Lie ideals

Cheng Kai Liu, Pao Kuei Liau

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


We apply elementary matrix computations and the theory of differential identities to prove the following: let R be a prime ring with extended centroid C and L a noncommutative Lie ideal of R. Suppose that f:L → R is a map and g is a generalized derivation of R such that [f(x), g(y)]=[x, y] for all x, y ∈ L. Then there exist a nonzero α ∈ C and a map μ: L → C such that g(x)=α x for all x ∈ R and f (x)=α-1x+ μ(x) for all x ∈ L, except when R ⊆ M2(F), the 2 × 2 matrix ring over a field F.

Original languageEnglish
Pages (from-to)905-915
Number of pages11
JournalLinear and Multilinear Algebra
Issue number8
Publication statusPublished - 2011 Aug 1

All Science Journal Classification (ASJC) codes

  • Algebra and Number Theory

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