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 | | He also defined the prime ideal associated to a primary ideal, and proved the existence of a primary decomposition of an arbitrary ideal in a rings of polynomials. |
 | | In a ring of polynomials, the ideals of the principal series are unmixed or, in modern terminology, a ring of polynomials is a Cohen–Macaulay ring. |
 | | By combining the finite basis condition for any ideal with the maximum condition, that is, the ascending chain condition for ideals (a ring with this property is called Noetherian), she obtained in its most general form the Lasker–Macaulay theory of primary decompositions, which had previously been especially computational and cumbersome. |
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