G4GaussJacobiQ.hh

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//
//
//
// Class description:
//
// Roots of ortogonal polynoms and corresponding weights are calculated based on
// iteration method (by bisection Newton algorithm). Constant values for initial
// approximations were derived from the book: M. Abramowitz, I. Stegun, Handbook
// of mathematical functions, DOVER Publications INC, New York 1965 ; chapters 9,
// 10, and 22 .
//
// ---------------------------------------------------------------------------
//
// Constructor for Gauss-Jacobi integration method. 
//
// G4GaussJacobiQ( function pFunction,
//                 G4double alpha,
//                 G4double beta, 
//       G4int nJacobi   ) 
//
// ----------------------------------------------------------------------------
//
// Gauss-Jacobi method for integration of ((1-x)^alpha)*((1+x)^beta)*pFunction(x)
// from minus unit to plus unit .
//
// G4double Integral() const

// ------------------------------- HISTORY -------------------------------------
//
// 13.05.97 V.Grichine (Vladimir.Grichine@cern.chz0

#ifndef G4GAUSSJACOBIQ_HH
#define G4GAUSSJACOBIQ_HH

#include "G4VGaussianQuadrature.hh"

class G4GaussJacobiQ : public G4VGaussianQuadrature
{
public:
        // Constructor

        G4GaussJacobiQ( function pFunction, 
                  G4double alpha,
                  G4double beta,
                  G4int nJacobi         ) ;
             
        // Methods
           
        G4double Integral() const ;

private:

  G4GaussJacobiQ(const G4GaussJacobiQ&);
  G4GaussJacobiQ& operator=(const G4GaussJacobiQ&);
};

#endif