Abstract
Let R be a prime ring of characteristic different from 2 and 3, Q r its right Martindale quotient ring, C its extended centroid, L a non-central Lie ideal of R and n ≥ 1 a fixed positive integer. Let α be an automorphism of the ring R. An additive map D: R → R is called an α-derivation (or a skew derivation) on R if D(xy) = D(x)y + α(x)D(y) for all x, y ∈ R. An additive mapping F: R → R is called a generalized α-derivation (or a generalized skew derivation) on R if there exists a skew derivation D on R such that F(xy) = F(x)y + α(x)D(y) for all x, y ∈ R.
We prove that, if F is a nonzero generalized skew derivation of R such that F(x)×[F(x), x]n = 0 for any x ∈ L, then either there exists λ ∈ C such that F(x) = λx for all x ∈ R, or R ⊆ M 2(C) and there exist a ∈ Q r and λ ∈ C such that F(x) = ax + xa + λx for any x ∈ R.
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De Filippis, V. Annihilating and power-commuting generalized skew derivations on lie ideals in prime rings. Czech Math J 66, 481–492 (2016). https://doi.org/10.1007/s10587-016-0270-1
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DOI: https://doi.org/10.1007/s10587-016-0270-1