STK_Funct_gamma.h

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/*--------------------------------------------------------------------*/
/*  Copyright (C) 2004-2007  Serge Iovleff
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.
    
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
    
    You should have received a copy of the GNU Lesser General Public
    License along with this program; if not, write to the
    Free Software Foundation, Inc.,
    59 Temple Place,
    Suite 330,
    Boston, MA 02111-1307
    USA
    
    Contact : Serge.Iovleff@stkpp.org
*/

/*
 * Project:  Analysis
 * Purpose:  Declaration of functions around the gamma function
 * Author:   Serge Iovleff, serge.iovleff@stkpp.org
 **/

#ifndef STK_FUNCT_GAMMA_H
#define STK_FUNCT_GAMMA_H

#include "../../Arrays/include/STK_Vector.h"

namespace STK
{

namespace Funct
{
Real factorial( Integer const& n);

Real factorial( Real const& z);

Real factorialLn( Integer const& n);

Real factorialLn( Real const& z);

Real gamma( Real const& z);

Real gammaLn( Real const& z);

Real gammaLnStirlingError(Real const& z);

Real gammaLnStirlingError(Integer const& z);

void stirlingCoefficients( STK::Vector& A);

} // namespace Funct

} // namespace STK

#endif // STK_FUNCT_GAMMA_H