1 citations · 2 across the 10 of their papers we have counts for
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Sharp threshold for universality of cokernels of classical random matrix models over the -adic integers
Jiwan Jung, Jungin Lee, Myungjun Yu
We prove that is the sharp threshold for universality of the distribution of cokernels of random matrices over . More precisely, let $α_n = \frac{c…
On the convergence of the graph sequence for a multipartite tournament
Ji-Hwan Jung, Suh-Ryung Kim, Hyesun Yoon
Given a positive integer , the -step competition graph of a digraph , denoted by , has the same vertex set as and has an edge between vertices and if a…
On the limit of the sequence for a multipartite tournament
Ji-Hwan Jung, Suh-Ryung Kim, Hyesun Yoon
For an integer , let be a Boolean block matrix with blocks for such that is a zero matrix and is a matrix with al…
Structural properties of Toeplitz graphs
Seyed Ahmad Mojallal, Ji-Hwan Jung, Gi-Sang Cheon +2
In this paper, we study structural properties of Toeplitz graphs. We characterize -free Toeplitz graphs for an integer and give equivalent conditions for a Toeplitz…
On competition indices and periods of multipartite tournaments
Ji-Hwan Jung, Suh-Ryung Kim, Hyesun Yoon
In this paper, we compute competition indices and periods of multipartite tournaments. We first show that the competition period of an acyclic digraph is one and is a…
Encoding labelled -Riordan graphs by words and pattern-avoiding permutations
Kittitat Iamthong, Ji-Hwan Jung, Sergey Kitaev
The notion of a -Riordan graph generalizes that of a Riordan graph, which, in turn, generalizes the notions of a Pascal graph and a Toeplitz graph. In this paper we introduce th…
Oriented Riordan graphs and their fractal property
Ji-Hwan Jung
In this paper, we use the theory of Riordan matrices to introduce the notion of an oriented Riordan graph. The oriented Riordan graphs are a far-reaching generalization of the well…
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…
Diameter of io-decomposable Riordan graphs of the Bell type
Ji-Hwan Jung
Recently, in the paper \cite{CJKM1} we suggested the two conjectures about the diameter of io-decomposable Riordan graphs of the Bell type. In this paper, we give a counterexample…
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…
Riordan graphs I: Structural properties
Gi-Sang Cheon, Ji-Hwan Jung, Sergey Kitaev +1
In this paper, we use the theory of Riordan matrices to introduce the notion of a Riordan graph. The Riordan graphs are a far-reaching generalization of the well known and well stu…