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Searching for Cutkosky's example (Q457948)

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scientific article; zbMATH DE number 6349614
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Searching for Cutkosky's example
scientific article; zbMATH DE number 6349614

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    Searching for Cutkosky's example (English)
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    30 September 2014
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    Let \(k\) be a field and \(R=k[[X_1,\dots, X_n]]/P\) where \(P\) is a prime ideal generated by polynomials in \(k[X_1,\dots,X_n]\) that are homogeneous with respect to the grading \(\deg X_i=a_i\) (\(i=1,\dots,n)\). The authors prove that the ideal \((X_1^{a_2a_3\cdots a_n}, X_2^{a_1a_3\cdots a_n}, \dots, X_n^{a_1a_2\cdots a_{n-1}})R\) has a unique Rees valuation. Additional classes of rings with zero-dimensional ideals having only one Rees valuation are also provided. The examples are motivated by work of \textit{S. D. Cutkosky} [Invent. Math. 98, No. 1, 59--74 (1989; Zbl 0715.13012)] who proved (non-constructively) the existence of a two-dimensional complete integrally closed local domain \((R, m)\) in which every \(m\)-primary ideal has more than one Rees valuation.
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    Rees valuations
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    integral closure of ideals
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