Jongyook Park

collaborators

2 papers

math.CO2025

Every $Q$ -polynomial distance-regular graph is sharp over $R$

Blas FernÃ¡ndez, Jae-Ho Lee, Jongyook Park

Let $I^$ denote a distance-regular graph with vertex set $X$ and diameter $D \geq 3$ . Fix a vertex $x \in X$ . Let the field $F$ be either $R$ or $C$ . Let…

math.CO2025

The nucleus of the Grassmann graph $J_{q} (N, D)$

Jae-Ho Lee, Jongyook Park, Ian Seong

Let $F_{q}$ denote a finite field with $q$ elements. Let $N$ and $D$ denote integers with $N > D \geq 1$ . Let $V$ denote an $N$ -dimensional vector space over $\mathbb…

Every Q-polynomial distance-regular graph is sharp over R

The nucleus of the Grassmann graph Jq​(N,D)

Every $Q$ -polynomial distance-regular graph is sharp over $R$

The nucleus of the Grassmann graph $J_{q} (N, D)$