BCMath.h

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/*
 * Copyright (C) 2008, Daniel Kollar and Kevin Kroeninger. 
 * All rights reserved. 
 * 
 * For the licensing terms see doc/COPYING. 
 */ 

// ---------------------------------------------------------

#ifndef __BCMATH__H
#define __BCMATH__H

#include <math.h>

// ---------------------------------------------------------

namespace BCMath
{

   double LogGaus(double x, double mean = 0, double sigma = 1, bool norm = false);

   double LogPoisson(double x, double par);

   double ApproxBinomial(int n, int k, double p);

   double LogApproxBinomial(int n, int k, double p);

   double LogBinomFactor(int n, int k);

   double ApproxLogFact(double x);

   double LogNoverK(int n, int k);

   double LogFact(int n);

   inline int Max(int x, int y)
   { return x >= y ? x : y; }

   inline double Max(double x, double y)
   { return x >= y ? x : y; }

   inline int Min(int x, int y)
   { return x <= y ? x : y; }

   inline double Min(double x, double y)
   { return x <= y ? x : y; }

   int Nint(double x); 

   double rms(int n, const double * a);

   /*
    * Calculates the logarithm of the non-relativistic Breit-Wigner
    * distribution. 
    */
   double LogBreitWignerNonRel(double x, double mean, double Gamma, bool norm = false); 

};

// --------------------------------------------------------- 

#endif

---