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►Unless otherwise noted, primes indicate derivatives with respect to the variable, and fractional powers take their principal values.
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►Whittaker’s notation is useful when is a nonnegative integer (Hermite polynomialcase).
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►►►Figure 18.21.1: Askey scheme.
…(This is with the convention that the real and imaginary parts of the parameters are counted separately in the case of the continuous Hahn polynomials.)
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