Lexsegment ideals are sequentially Cohen-Macaulay (Q2928439)

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scientific article; zbMATH DE number 6366777
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English
Lexsegment ideals are sequentially Cohen-Macaulay
scientific article; zbMATH DE number 6366777

    Statements

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    7 November 2014
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    lexsegment ideals
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    primary decomposition
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    pretty clean modules
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    sequentially Cohen-Macaulay ideals
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    Stanley depth
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    Lexsegment ideals are sequentially Cohen-Macaulay (English)
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    Let \(S=k[x_1,\dots,x_n]\) be the polynomial ring in \(n\) variables over a field \(k\), \(u,v\in S\) be two monomials of degree \(d\geq2\) and \(I=(L(u,v))\) the lexsegment ideal determined by \(u\) and \(v\). The author gives a complete description of the associated primes of lexsegment ideals. His description is given in terms of the support of the monomials \(u\) and \(v\). Moreover, he proves that \(S/I\) is a pretty clean \(S\)-module, therefore \(S/I\) is sequentially Cohen-Macaulay.
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