SciPy

This is documentation for an old release of SciPy (version 0.13.0). Read this page in the documentation of the latest stable release (version 1.15.1).

scipy.special.expn

scipy.special.expn(x1, x2[, out]) = <ufunc 'expn'>

y=expn(n,x) returns the exponential integral for integer n and non-negative x and n: integral(exp(-x*t) / t**n, t=1..inf).

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