subspaceit.h

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/*
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  This library 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 2.1 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 library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
 
#ifndef subspaceit_h
#define subspaceit_h
 
#include "sparsegeneigenvalsystemnm.h"
#include "convergedreason.h"
#include "sparsemtrx.h"
#include "floatarray.h"
 
#define _IFT_SubspaceIteration_Name "subspaceit"
 
namespace oofem {
class Domain;
class EngngModel;

class OOFEM_EXPORT SubspaceIteration : public SparseGeneralEigenValueSystemNM
{
private:
    int nitem;
 
public:
    SubspaceIteration(Domain * d, EngngModel * m);
    virtual ~SubspaceIteration() {}
 
    ConvergedReason solve(SparseMtrx &A, SparseMtrx &B, FloatArray &x, FloatMatrix &v, double rtol, int nroot) override;
    const char *giveClassName() const override { return "SubspaceIterationSolver"; }
};
} // end namespace oofem
#endif // subspaceit_h