Integral closedness of MI and the formula of Hoskin and Deligne for finitely supported complete ideals
classification
🧮 math.AC
math.AG
keywords
formulacompletedelignefinitelyhoskinidealidealssupported
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In this paper we find a formula for the length of a finitely supported complete ideal in terms of the order of the strict transform of the ideal. This formula was known for complete ideals of height two in a two dimensional regular local ring and was proved independently by Hoskin and Deligne. Several consequences are deduced from this formula.
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