include/Geant4/G4GaussChebyshevQ.hh

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0025 //
0026 // G4GaussChebyshevQ
0027 //
0028 // Class description:
0029 //
0030 // Class for Gauss-Chebyshev quadrature method
0031 // Roots of ortogonal polynoms and corresponding weights are calculated based on
0032 // iteration method (by bisection Newton algorithm). Constant values for initial
0033 // approximations were derived from the book:
0034 //   M. Abramowitz, I. Stegun, Handbook of mathematical functions,
0035 //   DOVER Publications INC, New York 1965 ; chapters 9, 10, and 22.
0036
0037 // Author: V.Grichine, 13.05.1997
0038 // --------------------------------------------------------------------
0039 #ifndef G4GAUSSCHEBYSHEVQ_HH
0040 #define G4GAUSSCHEBYSHEVQ_HH 1
0041
0042 #include "G4VGaussianQuadrature.hh"
0043
0044 class G4GaussChebyshevQ : public G4VGaussianQuadrature
0045 {
0046  public:
0047   G4GaussChebyshevQ(function pFunction, G4int nChebyshev);
0048   // Constructor for Gauss-Chebyshev quadrature method
0049
0050   ~G4GaussChebyshevQ() override = default;
0051
0052   G4GaussChebyshevQ(const G4GaussChebyshevQ&) = delete;
0053   G4GaussChebyshevQ& operator=(const G4GaussChebyshevQ&) = delete;
0054
0055   G4double Integral(G4double a, G4double b) const;
0056   // Integrates function pointed by fFunction from a to b by Gauss-Chebyshev
0057   // quadrature method
0058 };
0059
0060 #endif