
AbstractThe mutual injective hull of an arbitrary family of modules is constructed. Applications to the calculations of quasi-injective and π-injective hulls of direct sums are given.
Injective modules, self-injective associative rings, direct sums, mutual injective hull, quasi-injective hulls, \(\pi\)-injective hulls, essential extensions
Injective modules, self-injective associative rings, direct sums, mutual injective hull, quasi-injective hulls, \(\pi\)-injective hulls, essential extensions
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