//=====================================================================
// File: Economic.java
//
//=====================================================================

//=====================================================================
// Economic Class
//
//=====================================================================
public class Economic extends NL3System {


  private double r;
  private double b;
  double alpha1=0.5, alpha2=1.0, beta=0.25, d=3.63;
  //-----------------------------------------------
  // The functions f(x,y,z), g(x,y,z) and h(x,y,z)
  //-----------------------------------------------
  
  protected double f(double x, double y, double z, double t)
    { return( y ); }

  protected double g(double x, double y, double z, double t)
    { return( z ); }

  protected double h(double x, double y, double z, double t)
    { return( -alpha1*z-alpha2*y+beta*x*(d-x) ); }

  Economic() {
    super();
  }

  public void setParams(double ualpha1, double ualpha2, double ubeta,
                        double ud) {
     alpha1=ualpha1; alpha2=ualpha2; beta=ubeta;
     d=ud;
  }

};