Proceedings of the American Mathematical Society, Vol. 112, No. 4 (Aug., 1991), pp. 915-918 (4 pages) Suppose A is a local ring and R = A[ X, X-1 ] is a Laurent ...
Next projective modules having local, semiperfect and left perfect endomorphism rings are studied. It is shown that a projective module has a local endomorphism ring if and only if it is a cyclic ...
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