q-Chu-Vandermonde Identity
A q-analog of the Chu-Vandermonde identity given by
where 
is the q-hypergeometric function. The identity can also be written as
REFERENCES:
Bhatnagar, G. Inverse Relations, Generalized Bibasic Series, and their U(n) Extensions. Ph.D. thesis. Ohio State University, p. 18, 1995.
Gasper, G. and Rahman, M. Basic Hypergeometric Series. Cambridge, England: Cambridge University Press, p. 236, 1990.
Koepf, W. Hypergeometric Summation: An Algorithmic Approach to Summation and Special Function Identities. Braunschweig, Germany: Vieweg, p. 43, 1998.
