Abstract
The unified Ω-series of the Gauss and Bailey \(_2F_1(\frac{1}{2})\)-sums will be investigated by utilizing asymptotic methods and the modified Abel lemma on summation by parts. Several remarkable transformation theorems for the Ω-series will be proved whose particular cases turn out to be strange evaluations of nonterminating hypergeometric series and infinite series identities of Ramanujan-type, including a couple of beautiful expressions for π and the Catalan constant discovered by Guillera (2008).
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Chu, W. Infinite Series Formulae Related to Gauss and Bailey \(_2F_1(\frac{1}{2})\)-Sums. Acta Math Sci 40, 293–315 (2020). https://doi.org/10.1007/s10473-020-0201-y
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DOI: https://doi.org/10.1007/s10473-020-0201-y
Key words
- Abel’s lemma on summation by parts
- classical hypergeometric series
- Gauss’ \(_2F_1(\frac{1}{2})\)-sum
- Bailey’s \(_2F_1(\frac{1}{2})\)-sum
- Saddle point method
- Catalan’s constant