darkhistory.electrons.ics.BE_integrals.F_inv_a¶
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darkhistory.electrons.ics.BE_integrals.
F_inv_a
(lowlim, a, tol=1e-10)¶ Integral of 1/((x+a)(exp(x) - 1)) from lowlim to infinity.
Parameters: - a : ndarray
Parameter in (x+a).
- lowlim : ndarray
Lower limit of integration.
- tol : float
The relative tolerance to be reached.
Returns: - ndarray
The resulting integral.