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A unipotent realization of the chromatic quasisymmetric function
Algebra & Number Theory ( IF 0.9 ) Pub Date : 2024-09-19 , DOI: 10.2140/ant.2024.18.1737
Lucas Gagnon

We realize two families of combinatorial symmetric functions via the complex character theory of the finite general linear group GL n(𝔽q): chromatic quasisymmetric functions and vertical strip LLT polynomials. The associated GL n(𝔽q) characters are elementary in nature and can be obtained by induction from certain well-behaved characters of the unipotent upper triangular groups UT n(𝔽q). The proof of these results also gives a general Hopf algebraic approach to computing the induction map. Additional results include a connection between the relevant GL n(𝔽q) characters and Hessenberg varieties and a reinterpretation of known theorems and conjectures about the relevant symmetric functions in terms of GL n(𝔽q).



中文翻译:


色拟对称函数的单能实现



通过有限一般线性群的复特征理论实现了两族组合对称函数 GLn(𝔽q) :色拟对称函数和垂直条 LLT 多项式。相关的 GLn(𝔽q) 特征本质上是基本的,可以通过单能上三角群的某些表现良好的特征归纳来获得 UTn(𝔽q) 。这些结果的证明还给出了计算归纳图的通用 Hopf 代数方法。其他结果包括相关之间的联系 GLn(𝔽q) 特征和 Hessenberg 簇,以及对有关对称函数的已知定理和猜想的重新解释 GLn(𝔽q)

更新日期:2024-09-19
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