Remarks on Generalized Derivations in Prime and Semiprime Rings
2010 ◽
Vol 2010
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pp. 1-6
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LetRbe a ring with centerZandIa nonzero ideal ofR. An additive mappingF:R→Ris called a generalized derivation ofRif there exists a derivationd:R→Rsuch thatF(xy)=F(x)y+xd(y)for allx,y∈R. In the present paper, we prove that ifF([x,y])=±[x,y]for allx,y∈IorF(x∘y)=±(x∘y)for allx,y∈I, then the semiprime ringRmust contains a nonzero central ideal, providedd(I)≠0. In caseRis prime ring,Rmust be commutative, providedd≠0. The cases (i)F([x,y])±[x,y]∈Zand (ii)F(x∘y)±(x∘y)∈Zfor allx,y∈Iare also studied.
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2015 ◽
Vol 34
(2)
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pp. 29
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2021 ◽
Vol 39
(4)
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pp. 131-141
2012 ◽
Vol 11
(06)
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pp. 1250111
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