1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4GaussHermiteQ.hh,v 1.6 2006/06/29 18:59:35 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-04-beta-01 $ |
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29 | // |
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30 | // Class description: |
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31 | // |
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32 | // Roots of ortogonal polynoms and corresponding weights are calculated based on |
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33 | // iteration method (by bisection Newton algorithm). Constant values for initial |
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34 | // approximations were derived from the book: M. Abramowitz, I. Stegun, Handbook |
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35 | // of mathematical functions, DOVER Publications INC, New York 1965 ; chapters 9, |
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36 | // 10, and 22 . |
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37 | // |
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38 | // -------------------------------------------------------------------------- |
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39 | // |
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40 | // Constructor for Gauss-Hermite quadrature method . The function GaussHermite |
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41 | // should be called then |
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42 | // |
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43 | // G4GaussHermiteQ( function pFunction, G4int nHermite ) |
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44 | // |
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45 | // ---------------------------------------------------------------------------- |
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46 | // |
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47 | // Gauss-Hermite method for integration of std::exp(-x*x)*nFunction(x) from minus infinity |
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48 | // to plus infinity . |
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49 | // |
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50 | // G4double Integral() const |
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51 | |
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52 | // ------------------------------- HISTORY ------------------------------------- |
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53 | // |
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54 | // 13.05.97 V.Grichine (Vladimir.Grichine@cern.chz0 |
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55 | |
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56 | #ifndef G4GAUSSHERMITEQ_HH |
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57 | #define G4GAUSSHERMITEQ_HH |
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58 | |
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59 | #include "G4VGaussianQuadrature.hh" |
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60 | |
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61 | class G4GaussHermiteQ : public G4VGaussianQuadrature |
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62 | { |
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63 | public: |
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64 | // Constructor |
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65 | |
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66 | G4GaussHermiteQ( function pFunction, G4int nHermite ) ; |
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67 | |
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68 | // Methods |
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69 | |
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70 | G4double Integral() const ; |
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71 | |
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72 | |
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73 | private: |
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74 | |
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75 | G4GaussHermiteQ(const G4GaussHermiteQ&); |
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76 | G4GaussHermiteQ& operator=(const G4GaussHermiteQ&); |
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77 | |
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78 | }; |
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79 | |
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80 | #endif |
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