Next: , Up: Exponential Integrals


7.17.1 Exponential Integral

— Function: double gsl_sf_expint_E1 (double x)
— Function: int gsl_sf_expint_E1_e (double x, gsl_sf_result * result)

These routines compute the exponential integral E_1(x),

— Function: double gsl_sf_expint_E2 (double x)
— Function: int gsl_sf_expint_E2_e (double x, gsl_sf_result * result)

These routines compute the second-order exponential integral E_2(x),