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单词 VIemptysetImpliesIR
释义

V(I)= implies I=R


Note that most of the notation used here is defined in the entry prime spectrum.

Theorem.

If R is a commutative ring with identityPlanetmathPlanetmath and I is an ideal of R with V(I)=, then I=R.

Proof.

Let R be a commutative ring with identity and I be an ideal of R with IR. Then, by this theorem (http://planetmath.org/EveryRingHasAMaximalIdeal), there exists a maximal idealMathworldPlanetmathPlanetmath M of R containing I. Since M is , then M is a proper prime idealMathworldPlanetmathPlanetmath of R. Thus, MV(I). The theorem follows.∎

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