This is a survey of distance-regular graphs. We present an introduction to distance-regular
graphs for the reader who is unfamiliar with the subject, and then give an overview of some …

We consider a bipartite distance-regular graph Γ with diameter D⩾ 4 and valency k⩾ 3. Let X
denote the vertex set of Γ and fix x∈ X. Let Γ22 denote the graph with vertex set X˘={y∈ …

Let Γ denote a bipartite distance-regular graph with diameter at least 4 and valency at least
3. Fix a vertex of Γ and let T denote the corresponding Terwilliger algebra. Suppose that Γ is …

Let Γ denote a bipartite distance-regular graph with diameter D≥ 4, valency k≥ 3 and
intersection numbers ci, bi (0≤ i≤ D). By a pseudo cosine sequence of Γ we mean a …

Let Γ denote a bipartite distance-regular graph with diameter D⩾ 4, valency k⩾ 3, and
intersection numbers ci, bi (0⩽ i⩽ D). By a pseudo cosine sequence of Γ we mean a …