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Hollow modules and local endomorphism rings. (English) Zbl 0301.16005

MSC:
16L30 Noncommutative local and semilocal rings, perfect rings
16Gxx Representation theory of associative rings and algebras
16D70 Structure and classification for modules, bimodules and ideals (except as in 16Gxx), direct sum decomposition and cancellation in associative algebras)
16D50 Injective modules, self-injective associative rings
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