English

Deformation of Residual Intersections

Commutative Algebra 2026-04-23 v2

Abstract

It is shown that in a Cohen-Macaulay local ring, the generic linkage of an ideal II is a deformation of the arbitrary linkage of II. This fact does not need II to be a Cohen-Macaulay ideal. The same holds for ss-residual intersections of II when ss does not exceed the height of II by one. Under some slight conditions on II, one further generalizes this principle to encompass any ss-residual intersection.

Keywords

Cite

@article{arxiv.2405.12170,
  title  = {Deformation of Residual Intersections},
  author = {Hamid Hassanzadeh and Kevin Vasconcellos},
  journal= {arXiv preprint arXiv:2405.12170},
  year   = {2026}
}

Comments

24 pages

R2 v1 2026-06-28T16:33:19.554Z