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

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。

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

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。

youdao