Blas Fern'andez

collaborators

3 papers

math.CO2025

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

Blas Fernández, Jae-Ho Lee, Jongyook Park

Let $Γ$ 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

New Constructions of Distance-Biregular Graphs

Blas Fernández, Ferdinand Ihringer, Sabrina Lato +1

We construct a new family of distance-biregular graphs related to hyperovals and a new sporadic example of a distance-biregular graph related to Mathon's perp system. The infinite…

math.CO2025

On the $Q$ -polynomial property of bipartite graphs admitting a uniform structure

Blas Fernández, Roghayeh Maleki, Štefko Miklavič +1

Let $Γ$ denote a finite, connected graph with vertex set $X$ . Fix $x \in X$ and let $ε \geq 3$ denote the eccentricity of $x$ . For mutually distinct scalars $\{θ^*_i\}_{i=…

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

New Constructions of Distance-Biregular Graphs

On the Q-polynomial property of bipartite graphs admitting a uniform structure

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

On the $Q$ -polynomial property of bipartite graphs admitting a uniform structure