specialfunctions.h

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//
// ePDF
//
 
#pragma once
 
#include <complex>
 
namespace ePDF
{
  std::complex<double> psi(std::complex<double> const& z);
 
  inline double psi(double const& z)
  {
    std::complex<double> zc(z, 0.0);
    return psi(zc).real();
  }
 
  std::complex<double> dpsi(std::complex<double> const& z, int const& m);
 
  inline double dpsi(double const& z, int const& m)
  {
    std::complex<double> zc(z, 0.0);
    return dpsi(zc, m).real();
  }
 
  double wgplg(int const& n, int const& p, double const& x);
 
  inline double polylog(int const& n, double const& x) { return wgplg(n-1,1,x); }
 
  inline double dilog(double const& x) { return polylog(2,x); }
 
  inline double trilog(double const& x) { return polylog(3,x); }
}