Derivation of Logarithmic and Logarithmic Hyperbolic Tangent Integrals Expressed in Terms of Special Functions

The derivation of integrals in the table of Gradshteyn and Ryzhik in terms of closed form solutions is always of interest. We evaluate several of these definite integrals of the form <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mo&...

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Bibliographic Details
Main Authors: Robert Reynolds, Allan Stauffer
Format: Article
Language:English
Published: MDPI AG 2020-05-01
Series:Mathematics
Subjects:
Online Access:https://www.mdpi.com/2227-7390/8/5/687
Description
Summary:The derivation of integrals in the table of Gradshteyn and Ryzhik in terms of closed form solutions is always of interest. We evaluate several of these definite integrals of the form <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mo>∫</mo> <mrow> <mn>0</mn> </mrow> <mo>∞</mo> </msubsup> <mo form="prefix">log</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>±</mo> <msup> <mi>e</mi> <mrow> <mo>−</mo> <mi>α</mi> <mi>y</mi> </mrow> </msup> <mo>)</mo> </mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>k</mi> <mo>,</mo> <mi>a</mi> <mo>,</mo> <mi>y</mi> <mo>)</mo> </mrow> <mi>d</mi> <mi>y</mi> </mrow> </semantics> </math> </inline-formula> in terms of a special function, where <inline-formula> <math display="inline"> <semantics> <mrow> <mi>R</mi> <mo>(</mo> <mi>k</mi> <mo>,</mo> <mi>a</mi> <mo>,</mo> <mi>y</mi> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> is a general function and <i>k</i>, <i>a</i> and <inline-formula> <math display="inline"> <semantics> <mi>α</mi> </semantics> </math> </inline-formula> are arbitrary complex numbers, where <inline-formula> <math display="inline"> <semantics> <mrow> <mi>R</mi> <mi>e</mi> <mo>(</mo> <mi>α</mi> <mo>)</mo> <mo>></mo> <mn>0</mn> </mrow> </semantics> </math> </inline-formula>.
ISSN:2227-7390