DglapEvolution.h
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DglapEvolution.h
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	//==============================================================================
	// DglapEvolution.h
	//
	// Copyright (C) 2010-2013 Tobias Toll and Thomas Ullrich
	//
	// This file is part of Sartre version: 1.1
	//
	// This program is free software: you can redistribute it and/or modify
	// it under the terms of the GNU General Public License as published by
	// the Free Software Foundation.
	// 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 General Public License for more details.
	// You should have received a copy of the GNU General Public License
	// along with this program. If not, see <http://www.gnu.org/licenses/>.
	//
	// Author: Tobias Toll
	// Last update:
	// $Date: 2013-05-29 21:26:19 +0100 (Wed, 29 May 2013) $
	// $Author: thomas.ullrich@bnl.gov $
	//==============================================================================
	#ifndef DglapEvolution_h
	#define DglapEvolution_h

	class DglapEvolution {
	public:
	static DglapEvolution& instance();
	~DglapEvolution();

	double G(double x, double Q2);
	static double qns0(double);
	static double qs0(double);
	static double g0(double);
	void setS(double);

	double dxGdxOfLastCall() const;

	private:
	DglapEvolution();

	private:
	double mS;
	static double mAg;
	static double mLambdaG;
	static double mMu02;
	static double mDerivative;
	static DglapEvolution* mInstance;
	};

	#endif