Extended Wang sum and associated products

Robert Reynolds and Allan Stauffer

PLOS ONE, 2022, vol. 17, issue 10, 1-9

Abstract: The Wang sum involving the exponential sums of Lerch’s Zeta functions is extended to the finite sum of the Huwitz-Lerch Zeta function to derive sums and products involving cosine and tangent trigonometric functions. The general theorem used to derive these sums and products is in the form of the finite sum over positive integers of the Hurwitz-Lerch Zeta function where the associated parameters are general complex numbers. New Hurwitz-Lerch Zeta function recurrence identities with consecutive neighbours are derived. Some finite sum and product formulae examples involving cosine, tangent and the product of cosine and tangent functions are also derived and evaluated.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0276078

DOI: 10.1371/journal.pone.0276078

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