derivations with power values on multilinear polynomials

نویسندگان

s. huang

چکیده

a polynomial   1 2 ( , , , ) n f x x x is called multilinear if it is homogeneous and linear in every one of its variables. in the present paper our objective is to prove the following result: let   r be a prime k-algebra over a commutative ring   k with unity and let 1 2 ( , , , ) n f x x x be a multilinear polynomial over k. suppose that   d is a nonzero derivation on r such that 1 2 1 2 ( , , , ) ( , , , ) s t df x x x   n  f x x xn for all 1 2   , , , n x x x r, where s,t are fixed positive integers. then 1 2 ( , , , ) n f x x x is central-valued on r . we also examine the case r which is a semiprime k-algebra.

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عنوان ژورنال:
iranian journal of science and technology (sciences)

ISSN 1028-6276

دوره 39

شماره 4 2015

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