刘江. 前言[J]. 农业工程学报, 1989, 5(3): 1-2.
    引用本文: 刘江. 前言[J]. 农业工程学报, 1989, 5(3): 1-2.
    shu
    Liu Jiang. Foreword[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 1989, 5(3): 1-2.
    Citation: Liu Jiang. Foreword[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 1989, 5(3): 1-2.
    shu

    前言

    Foreword

      摘要
    • 摘要: 若环R上一切有限生成投射模都是自由模,则称R为PF环,本文讨论了PF环的一些性质及其一些应用。

       

      Abstract: If R is a ring in which finitely generated projective R-modules are free R-modules, then R is called a PF ring. It is well known that the polynomial rings over an PID are the PF rings. In this paper we obtained some properties of the PF rings, and gave some applications on the PF rings.

       

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