Exercise 19, § 2
Commutative Algebra, IV, 294
It is set in small type as supplementary.
Determine the primary ideals in the ring of a valuation of height 2 (cf. Chapter VI); deduce an example of a ring where there are ideals which are not intersections of a family (finite or otherwise) of primary ideals, although there exist in the ring only two distinct prime ideals. \*
Solution
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