15 citations · 57 across the 35 of their papers we have counts for
5 papers · 1 filter
Signed Mahonian polynomials for major and sorting indices
Huilan Chang, Sen-Peng Eu, Shishuo Fu +2
We derive some new signed Mahonian polynomials over the complex reflection group , where the "sign" is taken to be any of the -dim characters…
On the descent polynomial of signed multipermutations
Zhicong Lin
Motivated by a conjecture of Savage and Visontai about the equidistribution of the descent statistic on signed permutations of the multiset and the ascent…
Positivity properties of Jacobi-Stirling numbers and generalized Ramanujan polynomials
Zhicong Lin, Jiang Zeng
Generalizing recent results of Egge and Mongelli, we show that each diagonal sequence of the Jacobi-Stirling numbers $\js(n,k;z)$ and $\JS(n,k;z)$ is a Pólya frequency sequence if…
On some colored Eulerian quasisymmetric functions
Zhicong Lin
Recently, Hyatt introduced some colored Eulerian quasisymmetric function to study the joint distribution of excedance number and major index on colored permutation groups. We show…
Graph homomorphisms between trees
Péter Csikvári, Zhicong Lin
In this paper we study several problems concerning the number of homomorphisms of trees. We give an algorithm for the number of homomorphisms from a tree to any graph by the Transf…