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  1. Free, publicly-accessible full text available April 1, 2025
  2. IfIIis an ideal in a Gorenstein ringSS, andS/IS/Iis Cohen-Macaulay, then the same is true for any linked idealII’; but such statements hold for residual intersections of higher codimension only under restrictive hypotheses, not satisfied even by ideals as simple as the idealLnL_{n}of minors of a generic2×<#comment/>n2 \times nmatrix whenn>3n>3.

    In this paper we initiate the study of a different sort of Cohen-Macaulay property that holds for certain general residual intersections of the maximal (interesting) codimension, one less than the analytic spread ofII. For example, suppose thatKKis the residual intersection ofLnL_{n}by2n−<#comment/>42n-4general quadratic forms inLnL_{n}. In this situation we analyzeS/KS/Kand show thatIn−<#comment/>3(S/K)I^{n-3}(S/K)is a self-dual maximal Cohen-MacaulayS/KS/K-module with linear free resolution overSS.

    The technical heart of the paper is a result about ideals of analytic spread 1 whose high powers are linearly presented.

     
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