Difference between revisions of "Continuous q-Hermite polynomial"
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H_{n+1}(x|q) = 2xH_n(x|q) - (1-q^n)H_{n-1}(x|q). | H_{n+1}(x|q) = 2xH_n(x|q) - (1-q^n)H_{n-1}(x|q). | ||
\end{array} \right.$$ | \end{array} \right.$$ | ||
| + | |||
| + | =Properties= | ||
| + | <div class="toccolours mw-collapsible mw-collapsed"> | ||
| + | <strong>Theorem:</strong> The following formula holds: | ||
| + | $$\dfrac{1}{(te^{i\theta};q)_{\infty}(te^{-i\theta};q)_{\infty}} = \displaystyle\sum_{k=0}^{\infty} H_k(\cos \theta|q) \dfrac{t^k}{(q;q)_k},$$ | ||
| + | where $(\xi,q)_{\infty}$ denotes the [[Q-Pochhammer symbol|$q$-Pochhammer symbol]] and $H_k(\xi|q)$ denotes a [[continuous q-Hermite polynomial|continuous $q$-Hermite polynomial]]. | ||
| + | <div class="mw-collapsible-content"> | ||
| + | <strong>Proof:</strong> █ | ||
| + | </div> | ||
| + | </div> | ||
=References= | =References= | ||
[http://arxiv.org/pdf/1101.2875v4.pdf On the q-Hermite polynomials and their relationship with some other families of orthogonal polynomials] | [http://arxiv.org/pdf/1101.2875v4.pdf On the q-Hermite polynomials and their relationship with some other families of orthogonal polynomials] | ||
Revision as of 03:57, 21 May 2015
The continuous $q$-Hermite polynomials are defined by $$\left\{ \begin{array}{ll} H_0(x|q)=1 \\ H_1(x|q)=2x \\ H_{n+1}(x|q) = 2xH_n(x|q) - (1-q^n)H_{n-1}(x|q). \end{array} \right.$$
Properties
Theorem: The following formula holds: $$\dfrac{1}{(te^{i\theta};q)_{\infty}(te^{-i\theta};q)_{\infty}} = \displaystyle\sum_{k=0}^{\infty} H_k(\cos \theta|q) \dfrac{t^k}{(q;q)_k},$$ where $(\xi,q)_{\infty}$ denotes the $q$-Pochhammer symbol and $H_k(\xi|q)$ denotes a continuous $q$-Hermite polynomial.
Proof: █
