4 citations · 4 across the 3 of their papers we have counts for
3 papers
math.CO2018
Some properties of a class of refined Eulerian polynomials
Yidong Sun, Liting Zhai
In recent, H. Sun defined a new kind of refined Eulerian polynomials, namely, \begin{eqnarray*} A_n(p,q)=\sum_{π\in \mathfrak{S}_n}p^{{\rm odes}(π)}q^{{\rm edes}(π)} \end{eqnarray*…
math.CO2010★ 4 cited
Congruences on the Bell polynomials and the derangement polynomials
Yidong Sun, Xiaojuan Wu, Jujuan Zhuang
In this note, by the umbra calculus method, the Sun and Zagier's congruences involving the Bell numbers and the derangement numbers are generalized to the polynomial cases. Some sp…
math.CO2010
-factorials of
Yidong Sun, Jujuan Zhuang
Recently, by the Riordan's identity related to tree enumerations, \begin{eqnarray*} \sum_{k=0}^{n}\binom{n}{k}(k+1)!(n+1)^{n-k} &=& (n+1)^{n+1}, \end{eqnarray*} Sun and Xu derived…