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Derivations with annihilator conditions in prime rings

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Let R be a prime ring, I a nonzero ideal of R, d a derivation of R, m(≥ 1), n(≥ 1) two fixed integers and a ∈ R. (i) If a((d(x)y + xd(y) + d(y)x + yd(x))n − (xy + yx))m = 0 for all x, y ∈ I, then either a = 0 or R is commutative; (ii) If char(R) 6≠2 and a((d(x)y + xd(y) + d(y)x +yd(x))n −(xy +yx)) ∈ Z(R) for all x, y ∈ I, then either a = 0 or R is commutative.

Abstract

Let R be a prime ring, I a nonzero ideal of R, d a derivation of R, m(≥ 1), n(≥ 1) two fixed integers and a ∈ R. (i) If a((d(x)y + xd(y) + d(y)x + yd(x))n − (xy + yx))m = 0 for all x, y ∈ I, then either a = 0 or R is commutative; (ii) If char(R) 6≠2 and a((d(x)y + xd(y) + d(y)x +yd(x))n −(xy +yx)) ∈ Z(R) for all x, y ∈ I, then either a = 0 or R is commutative.

참고문헌 (15)

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  11. I. N. Herstein, "Topics in Ring Theory" (1969), Univ. of Chicago Press
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