arb_hypgeom_ei
Synopsis
#include <flint/arb_hypgeom.h>Sets res to the exponential integral \operatorname{Ei}(z) = -\int_{-z}^\infty e^{-t}/t \, dt (a principal value for z > 0), defined for real z \ne 0. Wrapper of acb_hypgeom_ei.
Cite this page
The FLINT team, “arb_hypgeom_ei (arb_hypgeom.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/arb_hypgeom/arb_hypgeom_ei.html (generated 2026-10-20).
@misc{flint-doc-arb-hypgeom-arb-hypgeom-ei,
author = {{The FLINT team}},
title = {{arb\_hypgeom\_ei (arb\_hypgeom.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/arb_hypgeom/arb_hypgeom_ei.html},
note = {Generated 2026-10-20}
}