Geant4 Cross Reference

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Geant4/global/HEPNumerics/include/G4GaussJacobiQ.hh

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 25 //
 26 // G4GaussJacobiQ
 27 //
 28 // Class description:
 29 //
 30 // Roots of ortogonal polynoms and corresponding weights are calculated based on
 31 // iteration method (by bisection Newton algorithm). Constant values for initial
 32 // approximations were derived from the book:
 33 //   M. Abramowitz, I. Stegun, Handbook of mathematical functions,
 34 //   DOVER Publications INC, New York 1965 ; chapters 9, 10, and 22.
 35 
 36 // Author: V.Grichine, 13.05.1997
 37 // --------------------------------------------------------------------
 38 #ifndef G4GAUSSJACOBIQ_HH
 39 #define G4GAUSSJACOBIQ_HH 1
 40 
 41 #include "G4VGaussianQuadrature.hh"
 42 
 43 class G4GaussJacobiQ : public G4VGaussianQuadrature
 44 {
 45  public:
 46   G4GaussJacobiQ(function pFunction, G4double alpha, G4double beta,
 47                  G4int nJacobi);
 48   // Constructor for Gauss-Jacobi integration method.
 49 
 50   G4GaussJacobiQ(const G4GaussJacobiQ&) = delete;
 51   G4GaussJacobiQ& operator=(const G4GaussJacobiQ&) = delete;
 52 
 53   G4double Integral() const;
 54   // Gauss-Jacobi method for integration of
 55   // ((1-x)^alpha)*((1+x)^beta)*pFunction(x) from minus unit to plus unit.
 56 };
 57 
 58 #endif
 59