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arXiv 0802.0442math.RA
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无穷小霍普夫代数与平面森林的偏序集

The infinitesimal Hopf algebra and the poset of planar forests

Loïc Foissy

摘要:

引入了平面树的无穷小霍普夫代数,推广了非交换Connes-Kreimer霍普夫代数的构造.定义了一个非退化对和一个对偶基,并给出了平面森林顶点序对的组合解释。此外,余积和配对也可以借助平面森林集合上的偏序来描述,使其同构于Tamari偏序集。作为推论,对偶基可以用莫比乌斯反演来计算。

英文摘要:

We introduce an infinitesimal Hopf algebra of planar trees, generalising the construction of the non-commutative Connes-Kreimer Hopf algebra. A non-degenerate pairing and a dual basis are defined, and a combinatorial interpretation of the pairing in terms of orders on the vertices of planar forests is given. Moreover, the coproduct and the pairing can also be described with the help of a partial order on the set of planar forests, making it isomorphic to the Tamari poset. As a corollary, the dual basis can be computed with a Möbius inversion.

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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