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Endomorphisms of Finitely Presented Modules
Proceedings of the American Mathematical Society
Vol. 30, No. 1 (Sep., 1971), pp. 75-78
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2038225
Page Count: 4
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It is proved that every surjective or injective endomorphism of a finitely presented left module over a right perfect ring is an isomorphism.
Proceedings of the American Mathematical Society © 1971 American Mathematical Society