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ON πœ™-EXACT SEQUENCES AND πœ™-PROJECTIVE MODULES

2

쑰회

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λ‹€μš΄λ‘œλ“œ

3

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μ°Έκ³ λ¬Έν—Œ

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초둝

Let R be a commutative ring with prime nilradical Nil(R) and M an R-module. Define the map πœ™ : R β†’ RNil(R) by Ο• ( r ) = r 1 for r ∈ R and πœ“ : M β†’ MNil(R) by ψ ( x ) = x 1 for x ∈ M. Then πœ“(M) is a πœ™(R)-module. An R-module P is said to be πœ™-projective if πœ“(P) is projective as a πœ™(R)-module. In this paper, πœ™-exact sequences and πœ™-projective R-modules are introduced and the rings over which all R-modules are πœ™-projective are investigated.

Abstract

Let R be a commutative ring with prime nilradical Nil(R) and M an R-module. Define the map πœ™ : R β†’ RNil(R) by Ο• ( r ) = r 1 for r ∈ R and πœ“ : M β†’ MNil(R) by ψ ( x ) = x 1 for x ∈ M. Then πœ“(M) is a πœ™(R)-module. An R-module P is said to be πœ™-projective if πœ“(P) is projective as a πœ™(R)-module. In this paper, πœ™-exact sequences and πœ™-projective R-modules are introduced and the rings over which all R-modules are πœ™-projective are investigated.

μ°Έκ³ λ¬Έν—Œ (28)

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