Gabriele Cosmo
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
// This code implementation is the intellectual property of
|
|
// the GEANT4 collaboration.
|
|
//
|
|
// By copying, distributing or modifying the Program (or any work
|
|
// based on the Program) you indicate your acceptance of this statement,
|
|
// and all its terms.
|
|
//
|
|
// $Id: G4GaussHermiteQ.hh,v 1.2 1999/11/16 17:30:57 gcosmo Exp $
|
|
// GEANT4 tag $Name: geant4-01-00 $
|
|
//
|
|
// 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-Hermite quadrature method . The function GaussHermite
|
|
// should be called then
|
|
//
|
|
// G4GaussHermiteQ( function pFunction, G4int nHermite )
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Gauss-Hermite method for integration of exp(-x*x)*nFunction(x) from minus infinity
|
|
// to plus infinity .
|
|
//
|
|
// G4double Integral() const
|
|
|
|
// ------------------------------- HISTORY -------------------------------------
|
|
//
|
|
// 13.05.97 V.Grichine (Vladimir.Grichine@cern.chz0
|
|
|
|
#ifndef G4GAUSSHERMITEQ_HH
|
|
#define G4GAUSSHERMITEQ_HH
|
|
|
|
#include "G4VGaussianQuadrature.hh"
|
|
|
|
class G4GaussHermiteQ : public G4VGaussianQuadrature
|
|
{
|
|
public:
|
|
// Constructor
|
|
|
|
G4GaussHermiteQ( function pFunction, G4int nHermite ) ;
|
|
|
|
// Methods
|
|
|
|
G4double Integral() const ;
|
|
|
|
|
|
protected:
|
|
|
|
private:
|
|
|
|
} ;
|
|
|
|
|
|
#endif
|