English

Monomial ideals with arbitrarily high tiny powers in any number of variables

Commutative Algebra 2019-09-02 v2

Abstract

Powers of (monomial) ideals is a subject that still calls attraction in various ways. Let IK[x1,,xn]I\subset \mathbb K[x_1,\ldots,x_n] be a monomial ideal and let G(I)G(I) denote the (unique) minimal monomial generating set of II. How small can G(Ii)|G(I^i)| be in terms of G(I)|G(I)|? We expect that the inequality G(I2)>G(I)|G(I^2)|>|G(I)| should hold and that G(Ii)|G(I^i)|, i2i\ge 2, grows further whenever G(I)2|G(I)|\ge 2. In this paper we will disprove this expectation and show that for any nn and dd there is an m\mathfrak m-primary monomial ideal IK[x1,,xn]I\subset \mathbb K[x_1,\ldots,x_n] such that G(I)>G(Ii)|G(I)|>|G(I^i)| for all idi\le d.

Keywords

Cite

@article{arxiv.1908.10702,
  title  = {Monomial ideals with arbitrarily high tiny powers in any number of variables},
  author = {Oleksandra Gasanova},
  journal= {arXiv preprint arXiv:1908.10702},
  year   = {2019}
}

Comments

9 pages, 3 figures

R2 v1 2026-06-23T10:58:57.403Z