Gabriele Cosmo
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4GaussJacobiQ.hh,v 1.3 2000/11/20 17:26:42 gcosmo Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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// Class description:
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//
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// Roots of ortogonal polynoms and corresponding weights are calculated based on
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// iteration method (by bisection Newton algorithm). Constant values for initial
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// approximations were derived from the book: M. Abramowitz, I. Stegun, Handbook
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// of mathematical functions, DOVER Publications INC, New York 1965 ; chapters 9,
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// 10, and 22 .
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//
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// ---------------------------------------------------------------------------
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//
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// Constructor for Gauss-Jacobi integration method.
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//
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// G4GaussJacobiQ( function pFunction,
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// G4double alpha,
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// G4double beta,
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// G4int nJacobi )
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//
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// ----------------------------------------------------------------------------
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//
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// Gauss-Jacobi method for integration of ((1-x)^alpha)*((1+x)^beta)*pFunction(x)
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// from minus unit to plus unit .
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//
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// G4double Integral() const
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// ------------------------------- HISTORY -------------------------------------
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//
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// 13.05.97 V.Grichine (Vladimir.Grichine@cern.chz0
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#ifndef G4GAUSSJACOBIQ_HH
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#define G4GAUSSJACOBIQ_HH
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#include "G4VGaussianQuadrature.hh"
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class G4GaussJacobiQ : public G4VGaussianQuadrature
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{
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public:
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// Constructor
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G4GaussJacobiQ( function pFunction,
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G4double alpha,
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G4double beta,
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G4int nJacobi ) ;
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// Methods
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G4double Integral() const ;
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private:
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G4GaussJacobiQ(const G4GaussJacobiQ&);
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G4GaussJacobiQ& operator=(const G4GaussJacobiQ&);
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};
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#endif
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