34 citations · 281 across the 51 of their papers we have counts for
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math.CA2011★ 2 cited
Spectral properties of operators using tridiagonalisation
Mourad E. H. Ismail, Erik Koelink
A general scheme for tridiagonalising differential, difference or q-difference operators using orthogonal polynomials is described. From the tridiagonal form the spectral decomposi…
math.RT2011★ 34 cited
Matrix Valued Orthogonal Polynomials related to (SU(2) x SU(2),diag)
Erik Koelink, Maarten van Pruijssen, Pablo Roman
The matrix-valued spherical functions for the pair (K x K, K), K=SU(2), are studied. By restriction to the subgroup A the matrix-valued spherical functions are diagonal. For suitab…