Function trv::maths::eval_gamma_lanczos

• Defined in File maths.cpp

Function Documentation

std::complex<double> trv::maths::eval_gamma_lanczos(std::complex<double> z)

Evaluate the gamma function \( \Gamma(z) \) on the complex plane using the Lanczos approximation.

Here the Lanczos approximation series \( A_g(z) \) uses \( g = 7 \) with \( N = 9 \) terms.

See also

trv::eval_lanczos_approx_series()

Parameters:

z – Complex argument.

Returns:

Value of \( \Gamma(z) \).