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The edge ideals of $${{\textbf{t}}}$$ -spread d-partite hypergraphs
Collectanea Mathematica ( IF 1.1 ) Pub Date : 2023-08-01 , DOI: 10.1007/s13348-023-00410-y
Asli Musapaşaoğlu , Mehrdad Nasernejad , Ayesha Asloob Qureshi

Inspired by the definition of \({{\textbf{t}}}\)-spread monomial ideals, in this paper, we introduce \({{\textbf{t}}}\)-spread d-partite hypergraph \({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}}\) and study its edge ideal \(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\). We prove that \(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) has linear quotients, all powers of \(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) have linear resolution and the Rees algebra of \(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) is a normal Cohen-Macaulay domain. It is also shown that \(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) is normally torsion-free and a complete characterization of Cohen-Macaulay \(S/I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) is given.



中文翻译:

$${{\textbf{t}}}$$ 分布 d 部超图的边缘理想

受\({{\textbf{t}}}\) -spread 单项式理想定义的启发,在本文中,我们引入\({{\textbf{t}}}\) -spread d -partite hypergraph \( {\text {K}}^{{{\textbf{t}}}}_{{\text {V}}}\) 并研究其边缘理想 \(I({ \ text {K}}^{{ {\textbf{t}}}}_{{\text {V}}})\)。我们证明\(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) 具有线性商,\( I ( {\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\) 具有线性分辨率和 \(I({\text { K } }^{{{\textbf{t}}}}_{{\text {V}}})\) 是正常的 Cohen-Macaulay 域。还表明\(I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\)通常是无扭转的并且是 Cohen-Macaulay 的完整表征\(S/I({\text {K}}^{{{\textbf{t}}}}_{{\text {V}}})\ )给出。

更新日期:2023-08-02
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