Ei_3(x)
Function:
double
gsl_sf_expint_3
(double
x
)
Function:
int
gsl_sf_expint_3_e
(double
x
, gsl_sf_result *
result
)
These routines compute the exponential integral Ei_3(x) = \int_0^x dt \exp(-t^3) for x >= 0.