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Analytical valuation of some non-elementary integrals involving some exponential, hyperbolic and trigonometric elementary functions and derivation of new probability measures generalizing the gamma-type and normal distributions (2005.06951v3)

Published 27 Apr 2020 in math.GM

Abstract: The non-elementary integrals involving elementary exponential, hyperbolic and trigonometric functions, $ \int x\alpha e{\eta x\beta}dx, \int x\alpha \cosh\left(\eta x\beta\right)dx, \int x\alpha \sinh\left(\eta x\beta\right)dx, \int x\alpha \cos\left(\eta x\beta\right)dx$ and $\int x\alpha \sin\left(\eta x\beta\right)dx $ where $\alpha, \eta$ and $\beta$ are real or complex constants are evaluated in terms of the confluent hypergeometric function $_1F_1$ and the hypergeometric function $_1F_2$. The hyperbolic and Euler identities are used to derive some identities involving exponential, hyperbolic, trigonometric functions and the hypergeometric functions $_1F_1$ and $_1F_2$. Having evaluated, these non-elementary integrals, some new probability measures generalizing the gamma-type and normal distributions are also obtained. The obtained generalized distributions may, for example, allow to perform better statistical tests than those already known (e.g. chi-square ($\chi2$) statistical tests and those based on central limit theorem (CLT)).

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