docs/anasazi/Davidson_8h_source.html

// @HEADER

// *****************************************************************************

//                 Anasazi: Block Eigensolvers Package

//

// Copyright 2004 NTESS and the Anasazi contributors.

// SPDX-License-Identifier: BSD-3-Clause

// *****************************************************************************

// @HEADER


// This software is a result of the research described in the report

//

//     "A comparison of algorithms for modal analysis in the absence

//     of a sparse direct method", P. Arbenz, R. Lehoucq, and U. Hetmaniuk,

//     Sandia National Laboratories, Technical report SAND2003-1028J.

//

// It is based on the Epetra, AztecOO, and ML packages defined in the Trilinos

// framework ( http://trilinos.org/ ).


#ifndef DAVIDSON_H

#define DAVIDSON_H


#include "Epetra_ConfigDefs.h"


#include "Epetra_BLAS.h"

#include "Epetra_Comm.h"

#include "Epetra_Operator.h"

#include "Epetra_Time.h"


#include "CheckingTools.h"

#include "FortranRoutines.h"

#include "ModalAnalysisSolver.h"

#include "MyMemory.h"

#include "ModalTools.h"

#include "SortingTools.h"


class Davidson : public ModalAnalysisSolver {


  private:


    const CheckingTools myVerify;

    const Epetra_BLAS callBLAS;

    const FortranRoutines callFortran;

    ModalTools modalTool;

    const SortingTools mySort;


    const Epetra_Comm &MyComm;

    const Epetra_Operator *K;

    const Epetra_Operator *M;

    const Epetra_Operator *Prec;

    const Epetra_Time MyWatch;


    double tolEigenSolve;

    int maxIterEigenSolve;


    int blockSize;

    int numBlock;


    double *normWeight;


    int verbose;


    int historyCount;

    double *resHistory;


    int maxSpaceSize;

    int sumSpaceSize;

    int *spaceSizeHistory;


    double memRequested;

    double highMem;


    int massOp;

    int numRestart;

    int outerIter;

    int precOp;

    int residual;

    int stifOp;


    double timeLocalProj;

    double timeLocalSolve;

    double timeLocalUpdate;

    double timeMassOp;

    double timeNorm;

    double timeOrtho;

    double timeOuterLoop;

    double timePostProce;

    double timePrecOp;

    double timeResidual;

    double timeRestart;

    double timeStifOp;


    // Private functions

    void accuracyCheck(const Epetra_MultiVector *X, const Epetra_MultiVector *MX,

                       const Epetra_MultiVector *Q) const;


    // Don't define these functions

    Davidson(const Davidson &ref);

    Davidson& operator=(const Davidson &ref);


  public:


    Davidson(const Epetra_Comm &_Comm, const Epetra_Operator *KK,

              const Epetra_Operator *PP, int _blk, int _numBlk,

              double _tol = 1.0e-08, int _maxIter = 100, int _verb = 0);


    Davidson(const Epetra_Comm &_Comm, const Epetra_Operator *KK,

              const Epetra_Operator *MM, const Epetra_Operator *PP, int _blk, int _numBlk,

              double _tol = 1.0e-08, int _maxIter = 100, int _verb = 0, double *_weight = 0);


    ~Davidson();


    int solve(int numEigen, Epetra_MultiVector &Q, double *lambda);


    int reSolve(int numEigen, Epetra_MultiVector &Q, double *lambda, int startingEV = 0);


    int minimumSpaceDimension(int nev) const;


    void initializeCounters();


    void algorithmInfo() const;

    void historyInfo() const;

    void memoryInfo() const;

    void operationInfo() const;

    void timeInfo() const;


};


#endif