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CRITICAL BINOMIAL IDEALS OF NORTHCOTT TYPE
Journal of the Australian Mathematical Society ( IF 0.7 ) Pub Date : 2020-11-16 , DOI: 10.1017/s1446788720000385 P. A. GARCÍA‐SÁNCHEZ , D. LLENA , I. OJEDA
Journal of the Australian Mathematical Society ( IF 0.7 ) Pub Date : 2020-11-16 , DOI: 10.1017/s1446788720000385 P. A. GARCÍA‐SÁNCHEZ , D. LLENA , I. OJEDA
In this paper, we study a family of binomial ideals defining monomial curves in the n -dimensional affine space determined by n hypersurfaces of the form $x_i^{c_i} - x_1^{u_{i1}} \cdots x_n^{u_{1n}}$ in $\Bbbk [x_1, \ldots , x_n]$ with $u_{ii} = 0, \ i\in \{ 1, \ldots , n\}$ . We prove that the monomial curves in that family are set-theoretic complete intersections. Moreover, if the monomial curve is irreducible, we compute some invariants such as genus, type and Frobenius number of the corresponding numerical semigroup. We also describe a method to produce set-theoretic complete intersection semigroup ideals of arbitrary large height.
中文翻译:
NORTHCOTT 类型的关键二项式理想
在本文中,我们研究了定义单项式曲线的二项式理想族n -维仿射空间由下式确定n 形式的超曲面$x_i^{c_i} - x_1^{u_{i1}} \cdots x_n^{u_{1n}}$ 在$\Bbbk [x_1, \ldots , x_n]$ 和$u_{ii} = 0, \i\in \{ 1, \ldots , n\}$ . 我们证明了该族中的单项式曲线是集合论完全交集。此外,如果单项式曲线是不可约的,我们计算一些不变量,如相应的数值半群的属、类型和 Frobenius 数。我们还描述了一种产生任意大高度的集合论完全交半群理想的方法。
更新日期:2020-11-16
中文翻译:
NORTHCOTT 类型的关键二项式理想
在本文中,我们研究了定义单项式曲线的二项式理想族