English

Critical binomial ideals of Norhtcott type

Commutative Algebra 2017-05-30 v1

Abstract

In this paper, we study a family of binomial ideals defining monomial curves in the nn-dimensional affine space determined by nn hypersurfaces of the form xicix1ui1xnu1nk[x1,,xn]x_i^{c_i} - x_1^{u_{i1}} \cdots x_n^{u_{1n}} \in k[x_1, \ldots, x_n] with uii=0u_{ii} = 0, i{1,,n}i\in \{ 1, \ldots, n\}. We prove that, the monomial curves in that family are set-theoretic complete intersection. Moreover, if the monomial curve is irreducible, we compute some invariants such as genus, type and Fr\"obenius number of the corresponding numerical semigroup. We also describe a method to produce set-theoretic complete intersection semigroup ideals of arbitrary large height.

Keywords

Cite

@article{arxiv.1705.10268,
  title  = {Critical binomial ideals of Norhtcott type},
  author = {P. A. García-Sánchez and D. Llena and I. Ojeda},
  journal= {arXiv preprint arXiv:1705.10268},
  year   = {2017}
}