Let R be a prime ring with its Utumi ring of quotients U , C = Z (U ) extended centroid of R, F a nonzero generalized derivation of R, L a noncentral Lie ideal of R and k ≥ 2 a fixed integer. Suppose that there exists 0 = a ∈ R such that a[F (u n 1 ), u n 2 , . . . , u n k ] = 0 for all u ∈ L, where n 1 , n 2 , . . . , n k ≥ 1 are fixed integers. Then either there exists λ ∈ C such that F (x) = λx for all x ∈ R, or R satisfies s 4 , the standard identity in four variables.
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机译:设R为素环,其Utumi环为商U,C = Z(U)扩展为R的重心,F为R的非零广义导数,L为R的非中心李理想,且k≥2为固定整数。假设存在0 = a∈R使得a [F(u n 1),u n 2,。。 。 。 ,u n k] = 0对于所有u∈L,其中n 1,n 2,。。 。 。 ,n k≥1是固定整数。然后,要么存在λ∈C,使得对于所有x∈R都为F(x)=λx,或者R满足s 4,这是四个变量的标准身份。
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