Jae-Ho Lee

collaborators

2 papers

math.CO2026

Towards a classification of $1$ -homogeneous distance-regular graphs with positive intersection number $a_{1}$

Jack H. Koolen, Mamoon Abdullah, Brhane Gebremichel +1

Let $I^$ be a graph with diameter at least two. Then $I^$ is said to be $1$ -homogeneous (in the sense of Nomura) whenever for every pair of adjacent vertices $x$ and $y$ in $I^$ , t…

math.CO2024

On the (non-)existence of tight distance-regular graphs: a local approach

Jack H. Koolen, Jae-Ho Lee, Shuang-Dong Li +3

Let $I^$ denote a distance-regular graph with diameter $D \geq 3$ . JuriÅ¡iÄ and Vidali conjectured that if $I^$ is tight with classical parameters $(D, b, I^\pm, I^^{2})$ , $b \geq 2$ , then $Î…

Towards a classification of 1-homogeneous distance-regular graphs with positive intersection number a1​

On the (non-)existence of tight distance-regular graphs: a local approach

Towards a classification of $1$ -homogeneous distance-regular graphs with positive intersection number $a_{1}$