Hye-Ree Yoon

activity

20192024

collaborators

Showing math.COShow all

4 papers · 1 filter

math.CO2024

On the convergence of the graph sequence ${C^{m} (D)}_{m = 1}^{\infty}$ for a multipartite tournament $D$

Ji-Hwan Jung, Suh-Ryung Kim, Hyesun Yoon

Given a positive integer $m$ , the $m$ -step competition graph of a digraph $D$ , denoted by $C^{m} (D)$ , has the same vertex set as $D$ and has an edge between vertices $u$ and $v$ if a…

math.CO2022

On the limit of the sequence ${C^{m} (D)}_{m = 1}^{\infty}$ for a multipartite tournament $D$

Ji-Hwan Jung, Suh-Ryung Kim, Hyesun Yoon

For an integer $k \geq 2$ , let $A$ be a Boolean block matrix with blocks $A_{ij}$ for $1 \leq i, j \leq k$ such that $A_{ii}$ is a zero matrix and $A_{ij} + A_{j i}^{T}$ is a matrix with al…

math.CO2020

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 $D$ is one and $ζ (D) + 1$ is a…

math.CO2019

On $m$ -step competition graphs of bipartite tournaments

Soogang Eoh, Suh-Ryung Kim, Hyesun Yoon

In this paper, we completely characterize the $m$ -step competition graph of a bipartite tournament for any integer $m \geq 2$ . In addition, we compute the competition index and the…

On the convergence of the graph sequence {Cm(D)}m=1∞​ for a multipartite tournament D

On the limit of the sequence {Cm(D)}m=1∞​ for a multipartite tournament D

On competition indices and periods of multipartite tournaments

On m-step competition graphs of bipartite tournaments

On the convergence of the graph sequence ${C^{m} (D)}_{m = 1}^{\infty}$ for a multipartite tournament $D$

On the limit of the sequence ${C^{m} (D)}_{m = 1}^{\infty}$ for a multipartite tournament $D$

On $m$ -step competition graphs of bipartite tournaments