Difference between revisions of "Q-exponential e sub q"

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=Properties=
 
=Properties=
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[[Exponential e in terms of basic hypergeometric phi]]
<strong>Theorem:</strong> The following formula holds:
 
$$e_q(z)=\dfrac{1}{(z;q)_{\infty}},$$
 
where $e_q$ is the [[Q-exponential e|$q$-exponential $e$]] and $(z;q)_{\infty}$ denotes the [[q-Pochhammer symbol]].
 
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<strong>Proof:</strong> █
 
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{{:Exponential e in terms of basic hypergeometric phi}}
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[[Q-Euler formula for e sub q]]
 
 
{{:Q-Euler formula for e sub q}}
 
  
 
=References=
 
=References=

Revision as of 00:42, 11 June 2016

The $q$-exponential $e_q$ is defined for $0 < |q| <1$ and $|z|<1$ by the formula $$e_q(z) =\displaystyle\sum_{k=0}^{\infty} \dfrac{z^k}{(q;q)_k},$$ where $(q;q)_k$ denotes the q-Pochhammer symbol. Note that this function is different than the $q$-exponential $e_{\frac{1}{q}}$.

Properties

Exponential e in terms of basic hypergeometric phi

Q-Euler formula for e sub q

References

The History of q-Calculus and a New Method