Gi-Sang Cheon

activity

20182022

most citedRiordan graphs II: Spectral properties

1 citations · 1 across the 5 of their papers we have counts for

collaborators

5 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 $G (x, z) = Q (z)^{x} Q (- z)^{1 - x}$ , where $Q$ 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.CO2019

Word-representability of Toeplitz graphs

Gi-Sang Cheon, Jinha Kim, Minki Kim +1

Distinct letters $x$ and $y$ alternate in a word $w$ if after deleting in $w$ all letters but the copies of $x$ and $y$ we either obtain a word of the form $x y x y \dots$ (of even or…

math.CO2018

On k-11-representable graphs

Gi-Sang Cheon, Jinha Kim, Minki Kim +2

Distinct letters $x$ and $y$ alternate in a word $w$ if after deleting in $w$ all letters but the copies of $x$ and $y$ we either obtain a word of the form $x y x y \dots$ (of even or…

math.CO2018★ 1 cited

Riordan graphs II: Spectral properties

Gi-Sang Cheon, Ji-Hwan Jung, Sergey Kitaev +1

The authors of this paper have used the theory of Riordan matrices to introduce the notion of a Riordan graph in \cite{CJKM}. Riordan graphs are proved to have a number of interest…