科研之友
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摘要
Let R be a prime ring and delta a sigma-derivation of R, where sigma is an automorphism of R. Our aim (Theorem 1) is to determine any automorphism S of R[t; sigma, delta] satisfying S(A) subset of R for a one-sided ideal A not equal 0 of R by dropping the assumption t epsilon R[t; sigma, delta]. As an application, if R is a domain, it is shown that any X-inner automorphism of R[t; sigma, delta] stabilizes R.
- 出版日期2017
