A Symmetric Function of Increasing Forests
A Symmetric Function of Increasing Forests
复制标题
森林增加的对称函数
DOI:
10.1017/fms.2021.33
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Antonio Nigro
中科院分区:
文献类型:
--
作者:
Alex Abreu;Antonio Nigro
Abstract For an indifference graph G, we define a symmetric function of increasing spanning forests of G. We prove that this symmetric function satisfies certain linear relations, which are also satisfied by the chromatic quasisymmetric function and unicellular $\textrm {LLT}$ polynomials. As a consequence, we give a combinatorial interpretation of the coefficients of the $\textrm {LLT}$ polynomial in the elementary basis (up to a factor of a power of $(q-1)$), strengthening the description given in [4].