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arxiv: 1705.10268 · v1 · pith:AGT326MEnew · submitted 2017-05-29 · 🧮 math.AC

Critical binomial ideals of Norhtcott type

classification 🧮 math.AC
keywords idealsmonomialbinomialcompletecurvesfamilyintersectionldots
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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 $x_i^{c_i} - x_1^{u_{i1}} \cdots x_n^{u_{1n}} \in k[x_1, \ldots, x_n]$ with $u_{ii} = 0$, $i\in \{ 1, \ldots, n\}$. We prove that, the monomial curves in that family are set-theoretic complete 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.

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