Abstract
We introduce a full solution to a problem considered by Wang and Chu concerning series involving the squares of finite sums of the form \(1 + \frac{1}{3} + \cdots + \frac{1}{2n-1}\). Our proof involves techniques from the theory of colored multiple zeta values.
Similar content being viewed by others
References
Adamchik, V.S.: A certain series associated with Catalan’s constant. Z. Anal. Anwend. 21, 817–826 (2002)
Adams, C.C.: The newest inductee in the number hall of fame. Math. Mag. 71, 341–349 (1998)
Au, K.C.: Evaluation of one-dimensional polylogarithmic integral, with applications to infinite series, arXiv:2007.03957. A companion Mathematica package available at researchgate.net/publication/357601353
Berndt, B.: Ramanujan’s Notebooks, vol. 2. Springer, New York (1989)
Campbell, J.M.: Ramanujan-like series for \(\frac{1}{\pi }\) involving harmonic numbers. Ramanujan J. 46, 373–387 (2018)
Campbell, J.M.: Series containing squared central binomial coefficients and alternating harmonic numbers. Mediterr. J. Math. 16, 37 (2019)
Campbell, J.M.: A Wilf–Zeilberger-based solution to the Basel problem with applications. Discrete Math. Lett. 10, 21–27 (2022)
Campbell, J.M., Chen, K.-W.: Explicit identities for infinite families of series involving squared binomial coefficients. J. Math. Anal. Appl. 513(23), 126219 (2022)
Campbell, J.M., Levrie, P., Nimbran, A.S.: A natural companion to Catalan’s constant. J. Class. Anal. 18, 117–135 (2021)
Cantarini, M., D’Aurizio, J.: On the interplay between hypergeometric series, Fourier–Legendre expansions and Euler sums. Boll. Unione Mat. Ital. 12, 623–656 (2019)
Charlton, S., Gangl, H., Lai, L., Xu, C., Zhao, J.: On two conjectures of Sun concerning Apéry-like series, to appear: Forum Math. arXiv preprint arXiv:2210.14704, (2022)
Chen, H.: Interesting series associated with central binomial coefficients, Catalan numbers and harmonic numbers. J. Integer Seq. 19, 11 (2016)
Chu, W.: Infinite series on quadratic skew harmonic numbers. Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. 117, 75 (2023)
Coffey, M.W.: Evaluation of a ln tan integral arising in quantum field theory. J. Math. Phys. 49(15), 093508 (2008)
Gradshteyn, I.S., Ryzhik, I.M.: Table of Integrals, Series, and Products, 6th edn. Academic Press, San Diego (2000)
Nimbran, A.S.: Deriving Forsyth–Glaisher type series for \(\frac{1}{\pi }\) and Catalan’s constant by an elementary method. Math. Stud. 84, 69–86 (2015)
Nimbran, A. S., Levrie, P.: Series of the form \(\sum a_n \genfrac(){0.0pt}{}{2n}{n}\), to appear in Math. Student
Petkovšek, M., Wilf, H.S., Zeilberger, D.: \(A=B\). A K Peters Ltd, Wellesley (1996)
Sofo, A., Nimbran, A.S.: Euler-like sums via powers of log, arctan and arctanh functions. Integral Transforms Spec. Funct. 31, 966–981 (2020)
Sun, Z.-W.: New Conjectures in Number Theory and Combinatorics. Harbin Institute of Technology Press, Harbin (2021)
Wang, X., Chu, W.: Further Ramanujan-like series containing harmonic numbers and squared binomial coefficients. Ramanujan J. 52, 641–668 (2020)
Wang, X., Chu, W.: Series with harmonic-like numbers and squared binomial coefficients. Rocky Mountain J. Math. 52(5), 1849–1866 (2022)
Xu, C., Zhao, J.: Apéry-type series with summation indices of mixed parities and colored multiple zeta values, II, (2022) arXiv:2203.00777
Acknowledgements
The authors are very grateful for the referee feedback provided, which has substantially improved our article.
Author information
Authors and Affiliations
Contributions
All of the authors reviewed and contributed in an equal fashion to the manuscript. CX and JZ were responsible for much of the material on colored multiple zeta values and much of the material in Section 4 related to Theorem 7, and JC and PL were responsible for much of the rest of the material.
Corresponding author
Ethics declarations
Conflict of interest
There are no competing interests to declare.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Ce Xu is supported by the National Natural Science Foundation of China (Grant No. 12101008), the Natural Science Foundation of Anhui Province (Grant No. 2108085QA01), and the University Natural Science Research Project of Anhui Province. The corresponding Grant Number for the last case is KJ2020A0057. J. Zhao is supported by the Jacobs Prize from The Bishop’s School.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Campbell, J.M., Levrie, P., Xu, C. et al. On a problem involving the squares of odd harmonic numbers. Ramanujan J 63, 387–408 (2024). https://doi.org/10.1007/s11139-023-00765-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11139-023-00765-7