Stieltjes–Wigert polynomials
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In mathematics, Stieltjes–Wigert polynomials (named after Thomas Jan Stieltjes and Carl Severin Wigert) are a family of basic hypergeometric orthogonal polynomials in the basic Askey scheme, for the weight function [1]
on the positive real line x > 0.
The moment problem for the Stieltjes–Wigert polynomials is indeterminate; in other words, there are many other measures giving the same family of orthogonal polynomials (see Krein's condition).
Koekoek et al. (2010) give in Section 14.27 a detailed list of the properties of these polynomials.
Contents
Definition
The polynomials are given in terms of basic hypergeometric functions and the Pochhammer symbol by[2]
- Failed to parse (Missing <code>texvc</code> executable. Please see math/README to configure.): \displaystyle S_n(x;q) = \frac{1}{(q;q)_n}{}_1\phi_1(q^{-n},0;q,-q^{n+1}x)
(where q = e−1⁄(2k2)).
Orthogonality
Since the moment problem for these polynomials is indeterminate there are many different weight functions on [0,∞] for which they are orthogonal. Two examples of such weight functions are
and
Notes
References
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