G4GaussJacobiQ.hh

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// G4GaussJacobiQ
//
// 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.
 
// Author: V.Grichine, 13.05.1997
// --------------------------------------------------------------------
#ifndef G4GAUSSJACOBIQ_HH
#define G4GAUSSJACOBIQ_HH 1
 
#include "G4VGaussianQuadrature.hh"
 
class G4GaussJacobiQ : public G4VGaussianQuadrature
{
 public:
  G4GaussJacobiQ(function pFunction, G4double alpha, G4double beta,
                 G4int nJacobi);
  // Constructor for Gauss-Jacobi integration method.
 
  G4GaussJacobiQ(const G4GaussJacobiQ&) = delete;
  G4GaussJacobiQ& operator=(const G4GaussJacobiQ&) = delete;
 
  G4double Integral() const;
  // Gauss-Jacobi method for integration of
  // ((1-x)^alpha)*((1+x)^beta)*pFunction(x) from minus unit to plus unit.
};
 
#endif