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/* Declarations for minpack */

#ifdef __cplusplus
extern "C" {
#endif
/* find a zero of a system of N nonlinear functions in N variables by
   a modification of the Powell hybrid method (Jacobian calculated by
   a forward-difference approximation) */
void hybrd1_ ( void (*fcn)(int *n, double *x, double *fvec, int *iflag ), 
	       int *n, double *x, double *fvec, double *tol, int *info,
	       double *wa, int *lwa );

/* find a zero of a system of N nonlinear functions in N variables by
   a modification of the Powell hybrid method (Jacobian calculated by
   a forward-difference approximation, more general). */
void hybrd_ ( void (*fcn)(int *n, double *x, double *fvec, int *iflag ), 
	      int *n, double *x, double *fvec, double *xtol, int *maxfev,
	      int *ml, int *mu, double *epsfcn, double *diag, int *mode,
	      double *factor, int *nprint, int *info, int *nfev,
	      double *fjac, int *ldfjac, double *r, int *lr, double *qtf,
	      double *wa1, double *wa2, double *wa3, double *wa4);
  
/* find a zero of a system of N nonlinear functions in N variables by
   a modification of the Powell hybrid method (user-supplied Jacobian) */
void hybrj1_ ( void (*fcn)(int *n, double *x, double *fvec, double *fjec,
			   int *ldfjac, int *iflag ), int *n, double *x,
	       double *fvec, double *fjec, int *ldfjac, double *tol,
	       int *info, double *wa, int *lwa );
          
/* find a zero of a system of N nonlinear functions in N variables by
   a modification of the Powell hybrid method (user-supplied Jacobian,
   more general) */
void hybrj_ ( void (*fcn)(int *n, double *x, double *fvec, double *fjec,
			  int *ldfjac, int *iflag ), int *n, double *x,
	      double *fvec, double *fjec, int *ldfjac, double *xtol,
	      int *maxfev, double *diag, int *mode, double *factor,
	      int *nprint, int *info, int *nfev, int *njev, double *r,
	      int *lr, double *qtf, double *wa1, double *wa2,
	      double *wa3, double *wa4 );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (Jacobian calculated by a forward-difference approximation) */
void lmdif1_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			   int *iflag ),
	       int *m, int *n, double *x, double *fvec, double *tol,
	       int *info, int *iwa, double *wa, int *lwa );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (Jacobian calculated by a forward-difference approximation, more
   general) */
void lmdif_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			  int *iflag ),
	      int *m, int *n, double *x, double *fvec, double *ftol,
	      double *xtol, double *gtol, int *maxfev, double *epsfcn,
	      double *diag, int *mode, double *factor, int *nprint,
	      int *info, int *nfev, double *fjac, int *ldfjac, int *ipvt,
	      double *qtf, double *wa1, double *wa2, double *wa3,
	      double *wa4 );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (user-supplied Jacobian) */
void lmder1_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			   double *fjec, int *ldfjac, int *iflag ),
	       int *m, int *n, double *x, double *fvec, double *fjec,
	       int *ldfjac, double *tol, int *info, int *ipvt,
	       double *wa, int *lwa );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (user-supplied Jacobian, more general) */
void lmder_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			  double *fjec, int *ldfjac, int *iflag ),
	      int *m, int *n, double *x, double *fvec, double *fjec,
	      int *ldfjac, double *ftol, double *xtol, double *gtol,
	      int *maxfev, double *diag, int *mode, double *factor,
	      int *nprint, int *info, int *nfev, int *njev, int *ipvt,
	      double *qtf, double *wa1, double *wa2, double *wa3,
	      double *wa4 );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (user-supplied Jacobian, minimal storage) */
void lmstr1_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			   double *fjrow, int *iflag ), int *m, int *n,
	       double *x, double *fvec, double *fjac, int *ldfjac,
	       double *tol, int *info, int *ipvt, double *wa, int *lwa );

/* minimize the sum of the squares of nonlinear functions in N
   variables by a modification of the Levenberg-Marquardt algorithm
   (user-supplied Jacobian, minimal storage, more general) */
void lmstr_ ( void (*fcn)(int *m, int *n, double *x, double *fvec,
			  double *fjrow, int *iflag ), int *m,
	      int *n, double *x, double *fvec, double *fjac,
	      int *ldfjac, double *ftol, double *xtol, double *gtol,
	      int *maxfev, double *diag, int *mode, double *factor,
	      int *nprint, int *info, int *nfev, int *njev, int *ipvt,
	      double *qtf, double *wa1, double *wa2, double *wa3,
	      double *wa4 );
 
void chkder_ ( int *m, int *n, double *x, double *fvec, double *fjec,
	       int *ldfjac, double *xp, double *fvecp, int *mode,
	       double *err  );

double dpmpar_ ( int *i );

double enorm_ ( int *n, double *x );

#ifdef __cplusplus
}
#endif