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Engineering Handbook/Calculus/Integration/exponential functions

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for
( is the Error function)
where
where
and is the Gamma Function
when , , and
when , , and

Definite integrals

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for , which is the logarithmic mean
(the Gaussian integral)
(see Integral of a Gaussian function)
(!! is the double factorial)
( is the modified Bessel function of the first kind)