FLINT3.7.0-dev

acb_hypgeom_expint

Synopsis#include <flint/acb_hypgeom.h>
void acb_hypgeom_expint(acb_t res, const acb_t s, const acb_t z, slong prec)source

Sets res to the generalized exponential integral E_s(z) = z^{s-1} \Gamma(1-s, z), computed with acb_hypgeom_gamma_upper.

Cite this page

The FLINT team, “acb_hypgeom_expint (acb_hypgeom.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/acb_hypgeom/acb_hypgeom_expint.html (generated 2026-10-20).