xMath.h

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/*
 * Thermal-FIST package
 * 
 * Copyright (c) 2014-2019 Volodymyr Vovchenko
 *
 * GNU General Public License (GPLv3 or later)
 */
#ifndef THERMALFIST_XMATH_H
#define THERMALFIST_XMATH_H
 
 
namespace thermalfist {
 
  namespace xMath {

    constexpr double Pi() { return 3.14159265358979323846; }
    constexpr double GeVtoifm() { return 5.06773; }

    constexpr double GeVtoifm2() { return GeVtoifm() * GeVtoifm(); }

    constexpr double GeVtoifm3() { return GeVtoifm() * GeVtoifm() * GeVtoifm(); }

    constexpr double mnucleon() { return 0.938; }

    constexpr double mpion() { return 0.138; }



    double BesselI(int n, double x);
    
    double BesselK(int n, double x);
    
    double BesselI0(double x);
    
    double BesselK0(double x);
    
    double BesselI1(double x);
    
    double BesselK1(double x);
    
    double BesselJ0(double x);
    
    double BesselJ1(double x);
    
    double BesselY0(double x);
    
    double BesselY1(double x);
    
    double StruveH0(double x);
    
    double StruveH1(double x);
    
    double StruveL0(double x);
    
    double StruveL1(double x);
    
    double BesselK0exp(double x);
    
    double BesselK1exp(double x);
    
    double BesselKexp(int n, double x);
    
    double BesselI0exp(double x);
    
    double BesselI1exp(double x);
    
    double BesselIexp(int n, double x);
    
    double LogGamma(double x);
    
    double Gamma(double x);

    template<typename T> T LambertW0(T z);
  }
 
} // namespace thermalfist
 
// Implementation of template functions
#include "xMath.tcc"
 
#endif // THERMALFIST_XMATH_H