2 citations · 9 across the 21 of their papers we have counts for
Showing 2023Show all
3 papers · 1 filter
math.CO2023
On naturally labelled posets and permutations avoiding 12-34
David Bevan, Gi-Sang Cheon, Sergey Kitaev
A partial order on is naturally labelled (NL) if implies . We establish a bijection between {3, 2+2}-free NL posets and 12-34-avoiding permutations, d…
math.CO2023★ 1 cited
Row graphs of Toeplitz matrices
Gi-Sang Cheon, Bumtle Kang, Suh-Ryung Kim +1
In this paper, we study row graphs of Toeplitz matrices. The notion of row graphs was introduced by Greenberg et al. in 1984 and is closely related to the notion of competition gra…
math.CV2023
On the zeros of certain Sheffer sequences and their cognate sequences
Gi-Sang Cheon, Tamás Forgács, Khang Tran
Given a Sheffer sequence of polynomials, we introduce the notion of an associated sequence called the cognate sequence. We study the relationship between the zeros of this pair of…