Chih-wen Weng

activity

20032007

U_{q} (s l_{2})

and its equitable presentation

17 citations · 17 across the 4 of their papers we have counts for

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3 papers · 1 filter

math.CO2007

3-bounded property in a triangle-free distance-regular graph

Yeh-jong Pan, Chih-wen Weng

Let $Γ$ denote a distance-regular graph with classical parameters $(D, b, α, β)$ and $D \geq 3$ . Assume the intersection numbers $a_{1} = 0$ and $a_{2} \neq = 0$ . We show $Γ$ is 3-bounded in…

math.CO2003

An inequality for regular near polygons

Paul Terwilliger, Chih-wen Weng

Let $G$ denote a near-polygon distance-regular graph with diameter $d \geq 3$ , valency $k$ and intersection numbers $a_{1} > 0$ , $c_{2} > 1$ . Let $θ_{1}$ denote the second largest eigenvalue…

math.CO2003

Distance-regular graphs, pseudo primitive idempotents, and the Terwilliger algebra

Paul Terwilliger, Chih-wen Weng

Let $Γ$ denote a distance-regular graph with diameter $D \geq 3$ and Bose-Mesner algebra $M$ . For $θ \in C \cup \infty$ we define a 1 dimensional subspace of $M$ which we call $M (θ)$ .…