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// Copyright (C) 2004, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpLeastSquareMults.hpp 735 2006-06-04 06:10:05Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter              IBM    2004-09-23

#ifndef __IPLEASTSQUAREMULTS_HPP__
#define __IPLEASTSQUAREMULTS_HPP__

#include "IpAugSystemSolver.hpp"
#include "IpEqMultCalculator.hpp"

namespace Ipopt
{

  class LeastSquareMultipliers: public EqMultiplierCalculator
  {
  public:
    LeastSquareMultipliers(AugSystemSolver& augSysSolver);
    virtual ~LeastSquareMultipliers()
    {}

    /* overloaded from AlgorithmStrategyObject */
    virtual bool InitializeImpl(const OptionsList& options,
                                const std::string& prefix);

    virtual bool CalculateMultipliers(Vector& y_c,
                                      Vector& y_d);

  private:
    LeastSquareMultipliers();

    LeastSquareMultipliers(const LeastSquareMultipliers&);

    void operator=(const LeastSquareMultipliers&);

    SmartPtr<AugSystemSolver> augsyssolver_;
  };

} // namespace Ipopt

#endif

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