Encyclopedia : Q : QS : QSE (3 articles)

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Q-series
In mathematics, in the area of combinatorics, a q-series, also sometimes called a q-shifted factorial, is a q-analog of the common factorial. It is defined as [(a;q)_n = \prod_^ (1-aq^k).] It is usually considered first as a formal power series; it is also an analytic function of q, in ..

 

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