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arXiv 0905.3716math.CO
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d-Complete 偏序集推广了 Young 图的 Jeu de Taquin 性质

d-Complete Posets Generalize Young Diagrams for the Jeu de Taquin Property

Robert A. Proctor

AI总结:

本文将 jeu de taquin 过程推广至偏序集,证明所有 d-Complete 偏序集均具有 jeu de taquin 性质,并揭示了其更强的“同时”性质及部分逆命题。

摘要:

jeu de taquin 过程通过将斜标准 Young 表中的元素向西北方向移动,生成一个标准 Young 表。我们将该过程推广到偏序集:任意偏序集的某些部分编号被向上移动。如果该过程产生的编号不依赖于过程中所做的某些选择,则称该偏序集具有 jeu de taquin 性质。Young 图是标准 Young 表底层的偏序集。这些偏序集具有 jeu de taquin 性质。d-Complete 偏序集是满足某些局部结构条件的偏序集。它们是 Young 图、移位 Young 图和有根树的相互推广。我们证明所有 d-Complete 偏序集都具有 jeu de taquin 性质。证明表明每个 d-Complete 偏序集实际上具有更强的“同时”性质;这可能有助于对主要结果进行代数理解。陈述了一个部分逆命题:“非重叠”的同时偏序集是 d-Complete 的。

英文摘要:

The jeu de taquin process produced a standard Young tableau from a skew standard Young tableau by shifting its entries to the northwest. We generalize this process to posets: certain partial numberings of any poset are shifted upward. A poset is said to have the jeu de taquin property if the numberings resulting from this process do not depend upon certain choices made during the process. Young diagrams are the posets which underlie standard Young tableaux. These posets have the jeu de taquin property. d-Complete posets are posets which satisfy certain local structual conditions. They are mutual generalizations of Young diagrams, shifted Young diagrams, and rooted trees. We prove that all d-complete posets have the jeu de taquin property. The proof shows that each d-complete poset actually has the stronger "simultaneous" property; this may lead to an algebraic understanding of the main result. A partial converse is stated: "Non-overlapping" simultaneous posets are d-complete.

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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