force_F_Rational.h

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#ifndef FORCE_F_RATIONAL_INCLUDED
#define FORCE_F_RATIONAL_INCLUDED
 
#include "force_F.h"
 
#include "Field/field_F.h"
#include "Fopr/fopr_Rational.h"
#include "Tools/math_Rational.h"
 
#include "IO/bridgeIO.h"
using Bridge::vout;
 
 
class Force_F_Rational : public Force
{
 public:
  static const std::string class_name;
 
 private:
  Bridge::VerboseLevel m_vl;
 
  int m_Np;                // number of poles in rational approx.
  int m_n_exp, m_d_exp;    // numerator and denominator of the exponent
  double m_x_min, m_x_max; // valid range of approximate sign function
  int m_Niter;             // max iteration of shiftsolver
  double m_Stop_cond;      // stopping condition of shift solver
 
  Field_G *m_U;
  Fopr *m_fopr;
  Force *m_force;
 
  // rational approx. coefficients
  double m_a0;
  std::vector<double> m_bl;
  std::vector<double> m_cl;
 
 public:
  Force_F_Rational(Fopr *fopr, Force *force)
    : m_vl(CommonParameters::Vlevel()), m_fopr(fopr), m_force(force) {}
 
  Force_F_Rational(Fopr *fopr, Force *force, const Parameters& params)
    : m_vl(CommonParameters::Vlevel()), m_fopr(fopr), m_force(force)
  {
    set_parameters(params);
  }
 
  ~Force_F_Rational() {}
 
  void set_parameters(const Parameters& params);
  void set_parameters(const int Np, const int n_exp, const int d_exp, const double x_min, const double x_max,
                      const int Niter, const double Stop_cond);
 
  void get_parameters(Parameters& params) const;
 
  void set_config(Field *U)
  {
    m_U = (Field_G *)U;
    m_fopr->set_config(U);
    m_force->set_config(U);
  }
 
  void force_udiv(Field&, const Field&);
 
  void force_core1(Field&, const Field&, const Field&);  // dummy entry
  void force_udiv1(Field&, const Field&, const Field&);  // dummy entry
 
 private:
  void force_udiv_impl(Field_G&, const Field_F&);
};
#endif