Maximiliano Valle
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Registered User
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A simple Student.
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May 7 |
comment |
When does “second annihilator” of a (principal) ideal equal the ideal itself , ie $Ann_R(Ann_R(r))=Rr$? Quasi-Frobenius Rings are precisely the (Artinian) rings that Ann(ann(I))=I, ann(Ann(T))=T , Ann= right annihilator, ann=left annihilator. |
