满足[(XY) n ,(YX) n ]=0的环 RINGS SATISFYING[(XY) n , (YX) n ]=0 邱琦章 Qiu Qizhang first-author 本文对Faith-Herstein定理进行推广,证明满足[(XY) n ,(YX) n ]=0,n=n(x,y)的环,其换位子理想是诣零理想。 Th. 1. Let R be an associative rin, x, y∈R, a positive integer n=n(x, y), such that [(xy) n , yx) n ]=0 then the commutator ideal of R is nil. Th. 2 Suppose R is an associative ring, Z(R) the center of ring R. If x, y∈R, two positive integers n=n(x, y), m=m(x, y) such that (xy) n ±(yx) m ∈Z(R) then the commutator ideal of R is nil. 1986-03-01 2021-04-01 3