ncm_mpsf_sin_int_mpfr ()
void
ncm_mpsf_sin_int_mpfr (mpq_t q
,
mpfr_ptr res
,
mp_rnd_t rnd
);
Computes the sine integral
$$\mathrm{Si}(x) = \int_0^x \frac{\sin x'}{x'}\mathrm{d}x.$$
[skip]
ncm_sf_sin_int ()
gdouble
ncm_sf_sin_int (gdouble x
);
Computes the sine integral
$$\mathrm{Si}(x) = \int_0^x \frac{\sin x'}{x'}\mathrm{d}x.$$
Returns
the value of $\mathrm{Si}(x)$.