2 citations · 2 across the 3 of their papers we have counts for
3 papers
math.CO2021
On combinatorial properties and the zero distribution of certain Sheffer sequences
Gi-Sang Cheon, Tamás Forgács, Hana Kim +1
We present combinatorial and analytical results concerning a Sheffer sequence with a generating function of the form , where is a quadratic polynomi…
math.CO2020
Counting independent sets in Riordan graphs
Gi-Sang Cheon, Ji-Hwan Jung, Bumtle Kang +4
The notion of a Riordan graph was introduced recently, and it is a far-reaching generalization of the well-known Pascal graphs and Toeplitz graphs. However, apart from a certain su…
math.CO2014★ 2 cited
Mutation effects in ordered trees
Gi-Sang Cheon, Hana Kim, Louis W. Shapiro
A mutation will affect an individual and some or all of its descendants. In this paper, we investigate ordered trees with a distinguished vertex called the mutator. We describe var…