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Rings Which Admit Faithful Torsion Modules

Let R be a ring with identity, and let M be a unitary (left) R-module. Then M is said to be torsion provided that for every m ∈ M, there is a nonzero r ∈ R such that rm = 0. In this article, we study the question of the existence (and nonexistence) of faithful torsion modules over both commutative and noncommutative rings.