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On semi-perfect rings
Main resultsA ring is called semi-perfect if every finitely generated R-right-module has a projective cover.Equivalent conditions are" [ R/J, J the Jacobson- radical, is semi-simple artinian and idempotents can be lifted modulo J;or every simple R-right-module is of the form eR/eJ, e e R.These rings have been studied recently by …