3 papers
math.CO2024
Ungar Games on the Young-Fibonacci and the Shifted Staircase Lattices
Yunseo Choi, Katelyn Gan
In 2023, Defant and Li introduced the Ungar move, which sends an element of a finite meet-semilattice to the meet of some subset of the elements covered by . More recent…
math.CO2024
On the set partitions that require maximum sorts through the avoiding stack
Yunseo Choi, Katelyn Gan, Andrew Li +1
Recently, Xia introduced a deterministic variation of Defant and Kravitz's stack-sorting maps for set partitions and showed that any set partition is sorted by $ϕ^{N(p)}_…
math.CO2023
On a conjecture on pattern-avoiding machines
Christopher Bao, Giulio Cerbai, Yunseo Choi +2
Let be West's stack-sorting map, and let be the generalized stack-sorting map, where instead of being required to increase, the stack avoids subpermutations that are or…