GSLRootHelper.h

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// @(#)root/mathmore:$Id: GSLRootHelper.h 20882 2007-11-19 11:31:26Z rdm $
// Authors: L. Moneta, A. Zsenei   08/2005 

 /**********************************************************************
  *                                                                    *
  * Copyright (c) 2004 ROOT Foundation,  CERN/PH-SFT                   *
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  * This library is free software; you can redistribute it and/or      *
  * modify it under the terms of the GNU General Public License        *
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  * This library is distributed in the hope that it will be useful,    *
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// Header file for class GSLRootHelper
// 
// Created by: moneta  at Sun Nov 14 21:34:15 2004
// 
// Last update: Sun Nov 14 21:34:15 2004
// 
#ifndef ROOT_Math_GSLRootHelper
#define ROOT_Math_GSLRootHelper


namespace ROOT {
namespace Math {

  
  /** 
      Helper functions to test convergence of Root-Finding algorithms. 
      Used by ROOT::Math::RootFinder class (see there for the doc)
  */


   namespace GSLRootHelper {

     int TestInterval(double xlow, double xup, double epsAbs, double epsRel); 

     int TestDelta(double x1, double x0, double epsAbs, double epsRel); 

     int  TestResidual(double f,  double epsAbs);
   
   }

} // namespace Math
} // namespace ROOT


#endif /* ROOT_Math_GSLRootHelper */

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