Function trv::maths::get_lngamma_parts

• Defined in File maths.cpp

Function Documentation

void trv::maths::get_lngamma_parts(double x, double y, double &lnr, double &theta)

Get the real and imaginary parts of the log-gamma function \( \ln\Gamma(z = x + \mathrm{i}\,y) \).

See also

gsl_sf_lngamma_complex_e() used to evaluate the log-gamma function with complex argument.

Parameters:

• x – [in] Real part of the complex argument.

• y – [in] Imaginary part of the complex argument.

• lnr – [out] Real part of the log-gamma function value.

• theta – [out] Imaginary part of the log-gamma function value.