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arXiv 1504.04062math.CO
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偏序集的边Cohen-Macaulay连通性

Edgewise Cohen-Macaulay connectivity of partially ordered sets

Christos A. Athanasiadis, Myrto Kallipoliti

摘要:

证明了凸多胞体的面格的真部满足Cohen-Macaulay性质的一个强形式,即从其Hasse图中去掉任意闭区间中的所有边,得到一个秩相同的Cohen-Macaulay偏序集.研究了偏序集的边Cohen-Macaulay连通性的一个相应概念.例子和开放的问题进行了讨论。

英文摘要:

The proper parts of face lattices of convex polytopes are shown to satisfy a strong form of the Cohen--Macaulay property, namely that removing from their Hasse diagram all edges in any closed interval results in a Cohen--Macaulay poset of the same rank. A corresponding notion of edgewise Cohen--Macaulay connectivity for partially ordered sets is investigated. Examples and open questions are discussed.

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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