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Every prime ideal of an Artinian ring is maximal
Statement
Let be a commutative Artinian ring and let be a prime ideal of . Then is maximal.
Facts & Assumptions
Given: A commutative Artinian ring and a prime ideal .
Proof
By Correspondence theorem: ideals of correspond to ideals of containing , ideals of correspond to ideals of containing . Hence every descending chain of ideals in lifts to a descending chain of ideals in , so is Artinian. Because is prime, is an integral domain if and only if is a prime ideal says that is an integral domain.
The quotient is therefore an Artinian integral domain, so An Artinian integral domain is a field makes it a field. Then is a field if and only if is a maximal ideal forces to be maximal.
Hence every prime ideal of an Artinian ring is maximal.
Depends on
Used by
- The prime ideals of an Artinian ring are exactly its finitely many maximal ideals Corollary
- A Noetherian ring is Artinian exactly when every prime ideal is maximal Theorem
- An Artinian local ring has nilpotent maximal ideal, and its finite modules have finite length Theorem
- An Artinian ring is canonically the finite product of its localizations at its maximal ideals Theorem
- Every commutative Artinian ring is Noetherian Theorem
Dependency tree · two levels
17 results within two dependency steps of this one, each drawn at its shortest distance from it. An arrow runs from a result to what uses it, so the chart reads left to right and ends at this result, which carries a heavier outline. Every node is a link to that result. Click elsewhere on the chart to enlarge it.
Sources
- J. S. Milne, A Primer of Commutative Algebra, v4.03, Proposition 16.1 (standard reference, not scraped)
- The Stacks Project, Section 10.53: Artinian rings (standard reference, not scraped)