English

Some Ideals with Large Projective Dimension

Commutative Algebra 2012-12-04 v2

Abstract

For an ideal II in a polynomial ring over a field, a monomial support of II is the set of monomials that appear as terms in a set of minimal generators of II. Craig Huneke asked whether the size of a monomial support is a bound for the projective dimension of the ideal. We construct an example to show that, if the number of variables and the degrees of the generators are unspecified, the projective dimension of II grows at least exponentially with the size of a monomial support. The ideal we construct is generated by monomials and binomials.

Keywords

Cite

@article{arxiv.math/0604436,
  title  = {Some Ideals with Large Projective Dimension},
  author = {Giulio Caviglia and Manoj Kummini},
  journal= {arXiv preprint arXiv:math/0604436},
  year   = {2012}
}

Comments

Fixed an argument in the proof; added some comments