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arXiv 2408.01396math.CO
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关于星图的色对称同调

On the chromatic symmetric homology for star graphs

Laura Pierson

AI总结:

本文针对星图证明了 Chandler 等人关于色对称同调的部分猜想公式并加以推广,深化了对该图不变量的理解。

摘要:

色对称函数 $X_G$ 是一个幂级数,它通过为每种颜色分配一个变量并为每种着色分配一个单项式来编码图 $G$ 的真着色,使得单项式中变量的幂等于对应着色中使用相应颜色的次数。色对称同调 $H_*(G)$ 是一族双分次的 $\mathbb{C}[\mathfrak{S}_n]$-模,由 Sazdanović 和 Yip(2018)定义为 $X_G$ 的范畴化。Chandler、Sazdanović、Stella 和 Yip(2023)证明了 $H_*(G)$ 是比 $X_G$ 严格更强的图不变量,并且他们还计算或猜想了一些特殊情形下的公式。我们证明并推广了他们在星图情形下的一些猜想公式,星图中一个中心顶点与所有其他顶点相连,且不存在其他相连的顶点对。

英文摘要:

The chromatic symmetric function $X_G$ is a power series that encodes the proper colorings of a graph $G$ by assigning a variable to each color and a monomial to each coloring such that the power of a variable in a monomial is the number of times the corresponding color is used in the corresponding coloring. The chromatic symmetric homology $H_*(G)$ is a doubly graded family of $\mathbb{C}[\mathfrak{S}_n]$-modules that was defined by Sazdanović and Yip (2018) as a categorification of $X_G$. Chandler, Sazdanović, Stella, and Yip (2023) proved that $H_*(G)$ is a strictly stronger graph invariant than $X_G$, and they also computed or conjectured formulas for it in a number of special cases. We prove and extend some of their conjectured formulas for the case of star graphs, where one central vertex is connected to all other vertices and no other pairs of vertices are connected.

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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