If R has an identity, then a nonzero unitary R-module A is simple if its only submodules
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If R has an identity, then a nonzero unitary R-module A is simple if its only submodules are O and A. (a) Every simple R-module is cyclic. (b) If A is simple every R-module endomorphism is either the zero map or an isomorphism.
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a Let A be a simple Rmodule and let a be a nonzero element of A Then th...View the full answer
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Related Book For
Algebra Graduate Texts In Mathematics 73
ISBN: 9780387905181
8th Edition
Authors: Thomas W. Hungerford
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