2 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…