71 citations · 733 across the 109 of their papers we have counts for
4 papers · 1 filter
Circular bidiagonal pairs
Paul Terwilliger, Arjana Žitnik
A square matrix is said to be circular bidiagonal whenever (i) each nonzero entry is on the diagonal, or the subdiagonal, or in the top-right corner; (ii) each subdiagonal entry is…
A -polynomial structure associated with the projective geometry
Paul Terwilliger
There is a type of distance-regular graph, said to be -polynomial. In this paper we investigate a generalized -polynomial property involving a graph that is not necessarily d…
Distance-regular graphs, the subconstituent algebra, and the -polynomial property
Paul Terwilliger
This survey paper contains a tutorial introduction to distance-regular graphs, with an emphasis on the subconstituent algebra and the -polynomial property.
Tridiagonal pairs, alternating elements, and distance-regular graphs
Paul Terwilliger
The positive part of has a presentation with two generators , and two relations called the -Serre relations. The algebra …