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arXiv 1607.00733math.ACmath.AGmath.CO
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边理想的广义重数

Generalized multiplicities of edge ideals

Ali Alilooee, Ivan Soprunov, Javid Validashti

摘要:

我们利用交换代数和多面体几何的方法,探讨了无平方单项式理想的广义重数与超图的组合结构之间的联系。例如,我们证明了连通超图的连通分支上的$j$ -重数是乘法的,并且明确地将适当连通的一致超图的边理想的$j$ -重数与其特殊纤维环的Hilbert-Samuel重数联系起来.此外,我们提供了一般的边界的广义重的边理想和计算这些不变量类的一致超图。

英文摘要:

We explore connections between the generalized multiplicities of square-free monomial ideals and the combinatorial structure of the underlying hypergraphs using methods of commutative algebra and polyhedral geometry. For instance, we show the $j$-multiplicity is multiplicative over the connected components of a hypergraph, and we explicitly relate the $j$-multiplicity of the edge ideal of a properly connected uniform hypergraph to the Hilbert-Samuel multiplicity of its special fiber ring. In addition, we provide general bounds for the generalized multiplicities of the edge ideals and compute these invariants for classes of uniform hypergraphs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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