It is know that the DCC on prime ideals holds in Noetherian rings (see e.g., This question). I ask whether the converse holds: Is a commutative ring whose every descending chain of prime ideals stabilizes Noetherian?
2026-03-29 22:33:19.1774823599
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Is a ring whose every descending chain of prime ideals stabilizes, necessary Noetherian?
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The ring of algebraic integers is an example of a non-Noetherian ring with Krull dimension $1$, and so it would not have long chains of prime ideals.
Another example is an infinite direct product of fields: such a ring is von Neumann regular, and so it has Krull dimension $0$, but if it has infinitely many factors then it is not Noetherian.
This is not true. Here you can see an example of a non Noetherian ring which has exactly one prime ideal, and so your condition trivially holds there.
All prime ideals of $R/I$ where $R$ is the infinite polynomial ring