最后对根投射模的自同态环进行了讨论。

Finally, the endomorphism ring of radical-projective modules is discussed.

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本文给出并证明了右遗传、右完备环上投射模的对偶模仍然是投射模。

This Paper gives and proves the dual module of a projective module over aright hereditary and right perfect ring is stil projective.

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本文定义并研究了广义rigid环，并讨论了环上有限生成投射模的性质。

In this paper, we define and study GR rings and finitely generated projective modules over them.

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