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 #ifndef _SPHERICALHARMONICCOEFFICIENTSET_H_
 #define _SPHERICALHARMONICCOEFFICIENTSET_H_
 #include <complex>
 namespace Genfun {
 
   class SphericalHarmonicCoefficientSet {
     
   public:
     
     
     // Constructor:
     SphericalHarmonicCoefficientSet(unsigned int LMAX);
     
     // Copy Constructor:
     SphericalHarmonicCoefficientSet(const SphericalHarmonicCoefficientSet &);
     
     // Destructor:
     ~SphericalHarmonicCoefficientSet();
     
     
     // Get the size of the set:
     unsigned int getLMax() const;
     
     // Readonly access to a specific coefficient:
     const std::complex<double> & operator () (unsigned int l, int m) const;
     
     // Read/write access to a specific coefficient:
     std::complex<double> & operator () (unsigned int l, int m);
     
     // Assignement
     SphericalHarmonicCoefficientSet & operator= (const SphericalHarmonicCoefficientSet & );
 
     // Scale:
     SphericalHarmonicCoefficientSet & operator*= (const std::complex<double> & s );
 
     // Addition:
     SphericalHarmonicCoefficientSet & operator+= (const SphericalHarmonicCoefficientSet & );
 
     // Subtraction:
     SphericalHarmonicCoefficientSet & operator-= (const SphericalHarmonicCoefficientSet & );
     
     
   private:
     
     
     class Clockwork;
     Clockwork *c;
     
     
   };
   
   // Dump:
   std::ostream & operator<< ( std::ostream & o, const SphericalHarmonicCoefficientSet & c); 
   
   // Take the dot product:
   std::complex<double>  dot(const SphericalHarmonicCoefficientSet &, 
                 const SphericalHarmonicCoefficientSet &) ;
 
   // If an expansion in Spherical Harmonics is squared, another expansion in Spherical
   // harmonics is the result:
   SphericalHarmonicCoefficientSet squareExpansionCoefficients(const SphericalHarmonicCoefficientSet &);
 
 
 }
 
 #include "CLHEP/GenericFunctions/SphericalHarmonicCoefficientSet.icc"
 
 #endif
 
 

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