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arXiv 0803.1332math.ACmath.CO
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Cohen-Macaulay容许杂波

Cohen-Macaulay admissible clutters

Huy Tai Ha, Susan Morey, Rafael H. Villarreal

摘要:

无平方单项理想和杂波之间存在一一对应关系,它们也被称为简单超图。证明了纯混合的容许杂波是Cohen-Macaulay杂波。我们证明的猜想一致容许杂波的高度2和3。对于容许杂波的更大的高度,我们给出了一个家庭的例子表明,猜想可能会失败。当高度为4时,我们给出了一个新的条件,在此条件下,纯杂波是Cohen-Macaulay的。

英文摘要:

There is a one-to-one correspondence between square-free monomial ideals and clutters, which are also known as simple hypergraphs. It was conjectured that unmixed admissible clutters are Cohen-Macaulay. We prove the conjecture for uniform admissible clutters of heights 2 and 3. For admissible clutters of greater heights, we give a family of examples to show that the conjecture may fail. When the height is 4, we give an additional condition under which unmixed admissible clutters are Cohen-Macaulay.

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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