CLHEP/GenericFunctions/AssociatedLaguerre.hh
// -*- C++ -*-
// $Id: AssociatedLaguerre.hh,v 1.2 2001/05/16 05:10:29 joeb Exp $
//---------------------AssociatedLaguerre-----------------------------------//
// //
// Class AssociatedLaguerre. An associated laguerre polynomial L_n^k(x) //
// Joe Boudreau, Petar Maksimovic, November 1999 //
// //
// //
// Different definitions exist. These are taken from Arfken, Mathematical //
// Methods for physicists //
// //
//--------------------------------------------------------------------------//
#ifndef AssociatedLaguerre_h
#define AssociatedLaguerre_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
HEP_BEGIN_NAMESPACE(Genfun)
class AssociatedLaguerre : public AbsFunction {
FUNCTION_OBJECT_DEF(AssociatedLaguerre)
public:
// Constructor
AssociatedLaguerre(unsigned int n, unsigned int k);
// Copy constructor
AssociatedLaguerre(const AssociatedLaguerre &right);
// Destructor
virtual ~AssociatedLaguerre();
// Retreive function value
virtual double operator ()(double argument) const;
virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
// Get the integer variable n
unsigned int n() const;
// Get the integer variable k
unsigned int k() const;
private:
// It is illegal to assign an adjustable constant
const AssociatedLaguerre & operator=(const AssociatedLaguerre &right);
// Here is the decay constant
unsigned int _n;
// Here is the sigma
unsigned int _k;
// Here is the "work function"
const AbsFunction *_function;
// This function is needed in all constructors:
void create();
};
HEP_END_NAMESPACE(Genfun)
#endif
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