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 On exchange ideals Bull. Korean Math. Soc. 2005 Vol. 42, No. 2, 295-305 Published online June 1, 2005 Huanyin Chen Zhejiang Normal University Abstract : In this paper, we investigate exchange ideals and get some new characterization of exchange rings. It is shown that an ideal $I$ of a ring $R$ is an exchange ideal if and only if so is $QM_2(I)$. Also we observe that every exchange ideal can be characterized by exchange elements. Keywords : exchange ideal, matrix ring, extension MSC numbers : 1.60E+51 Downloads: Full-text PDF