G4GaussChebyshevQ.hh

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//
// G4GaussChebyshevQ
//
// Class description:
//
// Class for Gauss-Chebyshev quadrature method
// 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 G4GAUSSCHEBYSHEVQ_HH
#define G4GAUSSCHEBYSHEVQ_HH 1
 
#include "G4VGaussianQuadrature.hh"
 
class G4GaussChebyshevQ : public G4VGaussianQuadrature
{
 public:
  G4GaussChebyshevQ(function pFunction, G4int nChebyshev);
  // Constructor for Gauss-Chebyshev quadrature method
 
  ~G4GaussChebyshevQ() override = default;
 
  G4GaussChebyshevQ(const G4GaussChebyshevQ&) = delete;
  G4GaussChebyshevQ& operator=(const G4GaussChebyshevQ&) = delete;
 
  G4double Integral(G4double a, G4double b) const;
  // Integrates function pointed by fFunction from a to b by Gauss-Chebyshev
  // quadrature method
};
 
#endif