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arXiv 1407.4073math.CO
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Sashes的霍普夫代数的组合实现

Combinatorial Realization of the Hopf Algebra of Sashes

Shirley Law

摘要:

一个一般的格理论建设的阅读结构的Malvenuto-Mittenauer霍普夫代数(MR)的置换的霍普夫子代数。这些Hopf子代数的产品和余积的定义extrinary在嵌入MR。本文的目标是找到一个内在的组合描述的一个特定的这些Hopf子代数。这个霍普夫代数有一个由排列给出的自然基,我们称之为佩尔排列。佩尔排列是双射的组合对象,我们称之为sash,也就是说,一个1乘n的矩形的平铺有三种类型的瓷砖:黑色的1乘1的正方形,白色的1乘1的正方形,和白色的1乘2的矩形。双射诱导出一个带上的霍普夫代数结构。我们用带来描述乘积和余积,以及带上的自然偏序。我们还描述了带的对偶霍普夫代数的对偶余积和对偶积。

英文摘要:

A general lattice theoretic construction of Reading constructs Hopf subalgebras of the Malvenuto-Reutenauer Hopf algebra (MR) of permutations. The products and coproducts of these Hopf subalgebras are defined extrinsically in terms of the embedding in MR. The goal of this paper is to find an intrinsic combinatorial description of a particular one of these Hopf subalgebras. This Hopf algebra has a natural basis given by permutations that we call Pell permutations. The Pell permutations are in bijection with combinatorial objects that we call sashes, that is, tilings of a 1 by n rectangle with three types of tiles: black 1 by 1 squares, white 1 by 1 squares, and white 1 by 2 rectangles. The bijection induces a Hopf algebra structure on sashes. We describe the product and coproduct in terms of sashes, and the natural partial order on sashes. We also describe the dual coproduct and dual product of the dual Hopf algebra of sashes.

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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