10 citations · 26 across the 6 of their papers we have counts for
7 papers
Circular Hessenberg Pairs
Jae-Ho Lee
A square matrix is called Hessenberg whenever each entry below the subdiagonal is zero and each entry on the subdiagonal is nonzero. Let denote a Hessenberg matrix. Then is…
A New Feasibility Condition for the AT4 Family
Zheng-Jiang Xia, Jae-Ho Lee, Jack H. Koolen
Let be an antipodal distance-regular graph with diameter and eigenvalues . Then is tight in the sense of Jurišić, Koolen, and Terwilliger [12] when…
Remarks on pseudo-vertex-transitive graphs with small diameter
Jack H. Koolen, Jae-Ho Lee, Ying-Ying Tan
Let denote a -polynomial distance-regular graph with vertex set and diameter . Let denote the adjacency matrix of . For a vertex and for $0 \leq i \le…
Grassmann graphs, degenerate DAHA, and non-symmetric dual -Hahn polynomials
Jae-Ho Lee
We discuss the Grassmann graph with , having as vertices the -dimensional subspaces of an -dimensional vector space over the finite field …
Dual Polar Graphs, a nil-DAHA of Rank One, and Non-Symmetric Dual q-Krawtchouk Polynomials
Jae-Ho Lee, Hajime Tanaka
Let be a dual polar graph with diameter , having as vertices the maximal isotropic subspaces of a finite-dimensional vector space over the finite field $\mathbb{…
Nonsymmetric Askey-Wilson polynomials and -polynomial distance-regular graphs
Jae-Ho Lee
In his famous theorem (1982), Douglas Leonard characterized the -Racah polynomials and their relatives in the Askey scheme from the duality property of -polynomial distance-r…
-polynomial distance-regular graphs and a double affine Hecke algebra of rank one
Jae-Ho Lee
We study a relationship between -polynomial distance-regular graphs and the double affine Hecke algebra of type . Let denote a -polynomial distance-regu…