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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I simply wanted to give "just knowing" its best shot in the perfect place with the right ring.

我只是想在完美的时机时用正确的戒指给“我就是知道”一次最好的表现机会。

youdao