Power Sum Expansion of Chromatic Quasisymmetric Functions

Power Sum Expansion of Chromatic Quasisymmetric Functions
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色拟对称函数的幂和展开

DOI:
10.37236/4761
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发表时间:
2014
期刊:
Electron. J. Comb.
影响因子:
--
通讯作者:
Christos A. Athanasiadis
Christos A. Athanasiadis
中科院分区:
--
文献类型:
--
作者:
Christos A. Athanasiadis

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图的色拟对称函数是由Shareshian和Wachs在Stanley色对称函数的基础上引入的。证明了Shareshian和Wachs给出的一个用幂和对称函数表示自然单位区间阶不可比图的色拟对称函数的显式组合公式.证明使用Roichman公式的对称群的不可约特征标。
The chromatic quasisymmetric function of a graph was introduced by Shareshian and Wachs as a refinement of Stanley's chromatic symmetric function. An explicit combinatorial formula, conjectured by Shareshian and Wachs, expressing the chromatic quasisymmetric function of the incomparability graph of a natural unit interval order in terms of power sum symmetric functions, is proven. The proof uses a formula of Roichman for the irreducible characters of the symmetric group.