LogRationalApproximationCGM.h

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/*
 * 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; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2013 Soumyajit De
 */

#ifndef LOG_RATIONAL_APPROXIMATION_CGM_H_
#define LOG_RATIONAL_APPROXIMATION_CGM_H_

#include <shogun/lib/config.h>
#include <shogun/mathematics/linalg/ratapprox/opfunc/RationalApproximation.h>

#ifdef HAVE_EIGEN3

namespace shogun
{

template<class T> class SGVector;
template<class T> class CLinearOperator;
class CCGMShiftedFamilySolver;
class CJobResultAggregator;
class CIndependentComputationEngine;

class CLogRationalApproximationCGM : public CRationalApproximation
{
public:
    CLogRationalApproximationCGM();

    CLogRationalApproximationCGM(
        CLinearOperator<float64_t>* linear_operator,
        CIndependentComputationEngine* computation_engine,
        CEigenSolver* eigen_solver,
        CCGMShiftedFamilySolver* linear_solver,
        float64_t desired_accuracy);

    virtual ~CLogRationalApproximationCGM();

    virtual CJobResultAggregator* submit_jobs(SGVector<float64_t> sample);

    virtual const char* get_name() const
    {
        return "LogRationalApproximationCGM";
    }

private:
    CCGMShiftedFamilySolver* m_linear_solver;

    SGVector<complex128_t> m_negated_shifts;

    void init();
};

}

#endif // HAVE_EIGEN3
#endif // LOG_RATIONAL_APPROXIMATION_CGM_H_