Kitt ideal equality conjecture for algebraic residual intersections

Let RR be a Cohen–Macaulay ring, let aI\mathfrak a\subseteq I be ideals, and write

J=a:I.J=\mathfrak a:I.

Assume that JJ is an algebraic ss-residual intersection. The Kitt ideal Kitt(a,I)\operatorname{Kitt}(\mathfrak a,I) is the ideal constructed from the Koszul data of the inclusion aI\mathfrak a\subseteq I. Kitt ideal equality conjecture. Then

Kitt(a,I)=a:I.\operatorname{Kitt}(\mathfrak a,I)=\mathfrak a:I.

The claim is presented as a guess that sliding-depth hypotheses might be unnecessary for equality, although such hypotheses remain necessary in the cited context for Cohen–Macaulayness of residual intersections. The supplied text gives no resolution of this claim.

Sources & referencesView supporting material

Primary source

Vinicius Bouça and Seyed Hamid Hassanzadeh, “Residual Intersections are Koszul-Fitting ideals”, arXiv:1810.05134 (2019).

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