167 citations
- Dalian University of TechnologyCN14 papers
- Dalian UniversityCN5 papers
- Nanyang Technological UniversitySG5 papers
- Chinese Academy of SciencesCN3 papers
- Jilin Province Science and Technology DepartmentCN3 papers
- Jilin UniversityCN3 papers
- Liaoning Normal UniversityCN3 papers
- Peng Cheng LaboratoryCN3 papers
- Shandong UniversityCN3 papers
- Shenzhen Institutes of Advanced TechnologyCN3 papers
- University of Chinese Academy of SciencesCN3 papers
- University of HaifaIL3 papers
10 papers · 1 filter
Enumerating several statistics of r-Colored Dyck paths with no dd-steps having the same colors
Yidong Sun, Jinyi Wang, Xinyu Wang
An -colored Dyck path is a Dyck path with all -steps having one of colors in . In this paper, we consider several statistics on the set $…
The expected subtree number index in random polyphenylene and spiro chains
Yu Yang, Xiao-Jun Sun, Jia-Yi Cao +2
Subtree number index of a graph is the number of nonempty subtrees of . It is a structural and counting based topological index that has received more and mo…
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*…
Minors of a Class of Riordan Arrays Related to Weighted Partial Motzkin Paths
Yidong Sun, Luping Ma
A partial Motzkin path is a path from to in the -plane that does not go below the -axis and consists of up steps , down steps and ho…
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…
The largest singletons of set partitions
Yidong Sun, Xiaojuan Wu
Recently, Deutsch and Elizalde studied the largest and the smallest fixed points of permutations. Motivated by their work, we consider the analogous problems in set partitions. Let…