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arXiv 1703.06960math.CO
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关于整数分拆与合成的下集的维数

On the dimension of downsets of integer partitions and compositions

Michael Engen, Vincent Vatter

摘要:

我们的特点的下集的整数分区(有序的包含费勒斯图)和组合物(有序的广义子字顺序)具有有限的尺寸在Dushnik和Miller的意义。在划分的情况下,当所有划分的集合具有无穷维时,我们证明了每个划分的真下集具有有限维。对于组合物,我们确定了四个无穷维的最小下集,并建立了每个不包含这四个之一的下集具有有限维。

英文摘要:

We characterize the downsets of integer partitions (ordered by containment of Ferrers diagrams) and compositions (ordered by the generalized subword order) which have finite dimension in the sense of Dushnik and Miller. In the case of partitions, while the set of all partitions has infinite dimension, we show that every proper downset of partitions has finite dimension. For compositions we identify four minimal downsets of infinite dimension and establish that every downset which does not contain one of these four has finite dimension.

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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