English

An Example in Complete Intersections and an Erratum

Commutative Algebra 2017-02-02 v1

Abstract

This is essentially an erratum, with some example to indicate inconsistencies. Suppose A=k[X1,X2,,Xn]A=k[X_1, X_2, \ldots, X_n] is a polynomial ring over a field kk. The Complete Intersection conjecture states that, for any ideal II in AA, μ(I)=μ(I/I2)\mu(I)=\mu(I/I^2), where μ\mu denotes the minimal number of generators. When kk is an infinite field, with 1/2k1/2\in k, a proof of this conjecture was claimed recently, which was a consequence of a stronger claim. A counter example of this stronger claim surfaced recently. This note discusses such examples and attempts to provide some clarity to the inconsistencies in the literature.

Keywords

Cite

@article{arxiv.1702.00087,
  title  = {An Example in Complete Intersections and an Erratum},
  author = {Satya Mandal},
  journal= {arXiv preprint arXiv:1702.00087},
  year   = {2017}
}
R2 v1 2026-06-22T18:05:57.787Z