A ring R is called directly finite if for x,y∈R, xy=1 implies yx=1. In this paper, we first establish some new characterizations for directly finite rings and then investigate their some properties.%一个环R称为有向有限的,如果对于x,y∈R,xy=1蕴涵着yx=1.本文我们首先建立有向有限环的某些新的刻画,然后考察了它们的某些性质.
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