Exponential.h

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#ifndef EXPONENTIAL_H
#define EXPONENTIAL_H


// ----------------------------------------------------------------------
//
// Bridge object between C++ code and the GSL Exponential functions
//
// ----------------------------------------------------------------------

#ifndef ZMENVIRONMENT_H
  #include "ZMutility/ZMenvironment.h"
#endif
#include <utility>

ZM_BEGIN_NAMESPACE( zmsf )      /*  namespace zmsf  {  */

typedef std::pair<double,double> Dpair;


struct Exponential {

  static double Exp( const double x );

  static Dpair ExpErr( const double x ); 

  static double yExp( const double x, double y );

  static Dpair yExpErr( const double x, double y );

  static double ExpM1( const double x );

  static Dpair ExpM1Err( const double x );

  static double RelExp( const double x );

  static Dpair RelExpErr( const double x ); 

  static double RelExp2( const double x );

  static Dpair RelExp2Err( const double x );

  static double RelExpN( const int n, const double x );

  static Dpair RelExpNErr( const int n, const double x );


  static Dpair ExpxDx( const double x, const double dx );


  static Dpair yExpxDxDy( const double x, const double dx,
                   const double y, const double dy );

};  // Exponential

ZM_END_NAMESPACE( zmsf )        /*  }  // namespace zmsf  */

#endif  /* EXPONENTIAL_H */

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