Abstract
By combining the series rearrangement with a reformulation of Beta function, we prove a transformation theorem that reduces a double sum with seven free parameters to a terminating hypergeometric \({_4F_3}\)-series. Seven double sum identities are derived as consequences with one of them extending the recent double sum of Dunkl and Gasper (The sums of a double hypergeometric series and of the first m + 1 terms of \({_3F_2(a,b,c;(a+b+1)/2,2c;1)}\) when c = −m is a negative integer. arXiv:1412.4022v2 [math.CA], 2014).
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Chu, W. Further Double Sums of Dunkl and Gasper. Results Math 72, 171–180 (2017). https://doi.org/10.1007/s00025-016-0594-z
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DOI: https://doi.org/10.1007/s00025-016-0594-z