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arxiv: 1104.3173 · v2 · pith:4ZUDWGFBnew · submitted 2011-04-15 · 🧮 math.RA

Every module is an inverse limit of injective modules

classification 🧮 math.RA
keywords injectiveinverselimitmodulehomomorphismsinjectivesleftsystem
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It is shown that any left module A over a ring R can be written as the intersection of a downward directed system of injective submodules of an injective module; equivalently, as an inverse limit of one-to-one homomorphisms of injectives. If R is left Noetherian, A can also be written as the inverse limit of a system of surjective homomorphisms of injectives. Some questions are raised.

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