41 citations · 42 across the 6 of their papers we have counts for
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math-ph2017★ 41 cited
Algebraic Heun operator and band-time limiting
F. Alberto Grünbaum, Luc Vinet, Alexei Zhedanov
We introduce the algebraic Heun operator associated to any bispectral pair of operators. We show that these operators are natural generalizations of the ordinary Heun operator. Thi…
math.FA2017★ 1 cited
A generalization of Schur functions: applications to Nevanlinna functions, orthogonal polynomials, random walks and unitary and open quantum walks
F. Alberto Grünbaum, Luis Velázquez
Recent work on recurrence in quantum walks has provided a representation of Schur functions in terms of unitary operators. We propose a generalization of Schur functions by extendi…