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Askey–Wilson polynomials : ウィキペディア英語版
Askey–Wilson polynomials
In mathematics, the Askey–Wilson polynomials (or ''q''-Wilson polynomials) are a family of orthogonal polynomials introduced by as q-analogs of the Wilson polynomials. They include many of the other orthogonal polynomials in 1 variable as special or limiting cases, described in the Askey scheme. Askey–Wilson polynomials are the special case of Macdonald polynomials (or Koornwinder polynomials) for the non-reduced affine root system of type (''C'', ''C''1), and their 4 parameters ''a'', ''b'', ''c'', ''d'' correspond to the 4 orbits of roots of this root system.
They are defined by
:p_n(x;a,b,c,d|q) =
(ab,ac,ad;q)_na^\;_\phi_3 \left(
q^&abcdq^&ae^&ae^ \\
ab&ac&ad \end
; q,q \right
)
where φ is a basic hypergeometric function and ''x'' = cos(θ) and (,,,)''n'' is the q-Pochhammer symbol. Askey–Wilson functions are a generalization to non-integral values of ''n''.
==See also==

*Askey scheme

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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