9 citations · 25 across the 29 of their papers we have counts for
Showing 2022Show all
3 papers · 1 filter
math.CO2022
On Refinements of Wilf-Equivalence for Involutions
Sherry H. F. Yan, Lintong Wang, Robin D. P. Zhou
Let (resp. and ) denote the set of permutations (resp. involutions and alternating involutions) of length which avoid t…
math.CO2022
Combinatorics of Integer Partitions With Prescribed Perimeter
Zhicong Lin, Huan Xiong, Sherry H. F. Yan
We prove that the number of even parts and the number of times that parts are repeated have the same distribution over integer partitions with a fixed perimeter. This refines Strau…
math.CO2022
On a conjecture concerning the shuffle-compatible permutation statistics
Lihong Yang, Sherry H. F. Yan
The notion of shuffle-compatible permutation statistics was implicit in Stanley's work on P-partitions and was first explicitly studied by Gessel and Zhuang. The aim of this paper…