Injective Ring

Some articles on injective:

Injective Module - Theory - Submodules, Quotients, Products, and Sums
... Any product of (even infinitely many) injective modules is injective conversely, if a direct product of modules is injective, then each module is injective (Lam 1999, p ... Every direct sum of finitely many injective modules is injective ... factor modules, or infinite direct sums of injective modules need not be injective ...

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