2 papers
math.CO2024
On the permutations that strongly avoid the pattern 312 or 231
Junyao Pan, Pengfei Guo
In 2019, Bóna and Smith introduced the notion of \emph{strong pattern avoidance}, that is, a permutation and its square both avoid a given pattern. In this paper, we enumerate the…
math.CO2023
Sign-Balanced Pattern-Avoiding Permutation Classes
Junyao Pan, Pengfei Guo
A set of permutations is called sign-balanced if the set contains the same number of even permutations as odd permutations. Let be the set of permutati…