Abstract

AbstractA survey of recents advances in the theory of Heun operators is offered. Some of the topics covered include: quadratic algebras and orthogonal polynomials, differential and difference Heun operators associated to Jacobi and Hahn polynomials, connections with time and band limiting problems in signal processing.KeywordsBispectral problemsHeun equationAskey schemeOrthogonal polynomialsTime and band limitingMathematics Subject Classification (2000)Primary 33C80; Secondary 94A11

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