gammainc()

const mpreal mpfr::gammainc ( const mpreal & a, const mpreal & x, mp_rnd_t rnd_mode = mpreal::get_default_rnd() )

inline

Definition at line 2346 of file mpreal.h.

{
    /*
       The non-normalized (upper) incomplete gamma function of a and x:
       gammainc(a,x) := Gamma(a,x) = int(t^(a-1) * exp(-t), t=x..infinity)
    */
    mpreal y(0,(std::max)(a.getPrecision(), x.getPrecision()));
    mpfr_gamma_inc(y.mpfr_ptr(), a.mpfr_srcptr(), x.mpfr_srcptr(), rnd_mode);
    return y;
}

References gammainc(), mpfr::mpreal::get_default_rnd(), mpfr::mpreal::getPrecision(), mpfr::mpreal::mpfr_ptr(), mpfr::mpreal::mpfr_srcptr(), and x.

Referenced by gammainc().