Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Table in Gradshteyn and Ryzhik: Derivation of definite integrals of a Hyperbolic Function

Version 1 : Received: 8 May 2021 / Approved: 10 May 2021 / Online: 10 May 2021 (13:51:04 CEST)

A peer-reviewed article of this Preprint also exists.

Reynolds, R.; Stauffer, A. Table in Gradshteyn and Ryzhik: Derivation of Definite Integrals of a Hyperbolic Function. Sci 2021, 3, 37. Reynolds, R.; Stauffer, A. Table in Gradshteyn and Ryzhik: Derivation of Definite Integrals of a Hyperbolic Function. Sci 2021, 3, 37.

Journal reference: Sci 2021, 3, 37
DOI: 10.3390/sci3040037

Abstract

We present a method using contour integration to derive definite integrals and their associated infinite sums which can be expressed as a special function. We give a proof of the basic equation and some examples of the method. The advantage of using special functions is their analytic continuation which widens the range of the parameters of the definite integral over which the formula is valid. We give as examples definite integrals of logarithmic functions times a trigonometric function. In various cases these generalizations evaluate to known mathematical constants such as Catalan’s constant and π

Keywords

entries in Gradshteyn and Rhyzik, Lerch function, Logarithm function, Contour Integral, Cauchy, Infinite Integral

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