00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id$ 00028 // 00029 // Class description: 00030 // 00031 // Roots of ortogonal polynoms and corresponding weights are calculated based on 00032 // iteration method (by bisection Newton algorithm). Constant values for initial 00033 // approximations were derived from the book: M. Abramowitz, I. Stegun, Handbook 00034 // of mathematical functions, DOVER Publications INC, New York 1965 ; chapters 9, 00035 // 10, and 22 . 00036 // 00037 // -------------------------------------------------------------------------- 00038 // 00039 // Constructor for Gauss-Hermite quadrature method . The function GaussHermite 00040 // should be called then 00041 // 00042 // G4GaussHermiteQ( function pFunction, G4int nHermite ) 00043 // 00044 // ---------------------------------------------------------------------------- 00045 // 00046 // Gauss-Hermite method for integration of std::exp(-x*x)*nFunction(x) from minus infinity 00047 // to plus infinity . 00048 // 00049 // G4double Integral() const 00050 00051 // ------------------------------- HISTORY ------------------------------------- 00052 // 00053 // 13.05.97 V.Grichine (Vladimir.Grichine@cern.chz0 00054 00055 #ifndef G4GAUSSHERMITEQ_HH 00056 #define G4GAUSSHERMITEQ_HH 00057 00058 #include "G4VGaussianQuadrature.hh" 00059 00060 class G4GaussHermiteQ : public G4VGaussianQuadrature 00061 { 00062 public: 00063 // Constructor 00064 00065 G4GaussHermiteQ( function pFunction, G4int nHermite ) ; 00066 00067 // Methods 00068 00069 G4double Integral() const ; 00070 00071 00072 private: 00073 00074 G4GaussHermiteQ(const G4GaussHermiteQ&); 00075 G4GaussHermiteQ& operator=(const G4GaussHermiteQ&); 00076 00077 }; 00078 00079 #endif