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When does “second annihilator” of a (principal) ideal equal the ideal itself , ie $Ann_R(Ann_R(r))=Rr$?
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A graded ring $R$ is graded-local iff $R_0$ is a local ring?
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Short Course Suggestions For High School Students
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Koethe conjecture
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Name for semiring with weakened annihilation law?
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Simple Rings are V-Rings?
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What does the semiring of ideals of a ring R tell us about R?
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Rings in which every non-unit is a zero divisor