gr_exp_integral, gr_exp_integral_ei
Synopsis
#include <flint/gr_special.h>Set res to the generalised exponential integral E_s(z) = \int_1^\infty e^{-zt} t^{-s} \, dt with s = x and z = y, respectively the exponential integral \operatorname{Ei}(x).
Cite this page
The FLINT team, “gr_exp_integral, gr_exp_integral_ei (gr_special.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/gr_special/gr_exp_integral.html (generated 2026-10-20).
@misc{flint-doc-gr-special-gr-exp-integral,
author = {{The FLINT team}},
title = {{gr\_exp\_integral, gr\_exp\_integral\_ei (gr\_special.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/gr_special/gr_exp_integral.html},
note = {Generated 2026-10-20}
}