Racah polynomials
From Infogalactic: the planetary knowledge core
In mathematics, Racah polynomials are orthogonal polynomials named after Giulio Racah, as their orthogonality relations are equivalent to his orthogonality relations for Racah coefficients.
The Racah polynomials were first defined by Wilson (1978) and are given by
Askey & Wilson (1979) introduced the q-Racah polynomials defined in terms of basic hypergeometric functions by
They are sometimes given with changes of variables as
References
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