On Herstein's identity in prime rings

G. S. Sandhu


A celebrated result of Herstein [10, Theorem 6] states that a ring \(R\) must be commutative if \([x,y]^{n(x,y)}=[x,y]\) for all \(x,y\in R,\) where \(n(x,y)>1\) is an integer. In this paper, we investigate the structure of a prime ring satisfies the identity \(F([x,y])^{n}=F([x,y])\) and \(\sigma([x,y])^{n}=\sigma([x,y]),\) where \(F\) and \(\sigma\) are generalized derivation and automorphism of a prime ring \(R\), respectively and \(n>1\) a fixed integer.


prime rings, lie ideal, generalized derivation, automorphism, GPIs

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DOI: http://dx.doi.org/10.12958/adm1581


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