On ideals with skew derivations of prime rings. (English) Zbl 1324.16048
Summary: Let \(R\) be a prime ring and set \([x,y]_1=[x,y]=xy-yx\) for all \(x,y\in R\) and inductively \([x,y]_k=[[x,y]_{k-1},y]\) for \(k>1\). We apply the theory of generalized polynomial identities with automorphism and skew derivations to obtain the following result: Let \(R\) be a prime ring and \(I\) a nonzero ideal of \(R\). Suppose that \((\delta,\varphi)\) is a skew derivation of \(R\) such that \(\delta([x,y])=[x,y]_n\) for all \(x,y\in I\), then \(R\) is commutative.
MSC:
16W25 | Derivations, actions of Lie algebras |
16R50 | Other kinds of identities (generalized polynomial, rational, involution) |
16N60 | Prime and semiprime associative rings |
16U80 | Generalizations of commutativity (associative rings and algebras) |