English

The strongly robust simplicial complex of monomial curves

Commutative Algebra 2023-05-22 v1 Algebraic Geometry Combinatorics

Abstract

To every simple toric ideal ITI_T one can associate the strongly robust simplicial complex ΔT\Delta _T, which determines the strongly robust property for all ideals that have ITI_T as their bouquet ideal. We show that for the simple toric ideals of monomial curves in As\mathbb{A}^{s}, the strongly robust simplicial complex ΔT\Delta _T is either {}\{\emptyset \} or contains exactly one 0-dimensional face. In the case of monomial curves in A3\mathbb{A}^{3}, the strongly robust simplicial complex ΔT\Delta _T contains one 0-dimensional face if and only if the toric ideal ITI_T is a complete intersection ideal with exactly two Betti degrees. Finally, we provide a construction to produce infinitely many strongly robust ideals with bouquet ideal the ideal of a monomial curve and show that they are all produced this way.

Keywords

Cite

@article{arxiv.2305.11743,
  title  = {The strongly robust simplicial complex of monomial curves},
  author = {Dimitra Kosta and Apostolos Thoma and Marius Vladoiu},
  journal= {arXiv preprint arXiv:2305.11743},
  year   = {2023}
}

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17 pages