J:/Tecgraf/prj/femoop/trunk/eig/eighqr.h

// --------------------------------------------------------------------------
//
// EigHQR.h - This file contains routines for solving the eigenvalue
//            problem in a general form, i.e.: K x = l M x, by using
//            Householder transformations and QR iterations. The 
//            eigenvectors are calculated by matrices products.
//
// --------------------------------------------------------------------------
//
// $Author: joaquim $
// $Revision: 1.2 $
// $Date: 1998/02/16 20:21:11 $
// $State: Exp $
//
// --------------------------------------------------------------------------

#ifndef _EIGHQR_H
#define _EIGHQR_H

#include "gbldefs.h"
#include "eig.h"

// -------------------------------------------------------------------------
// HQR class:

class cEigenHQR : public cEigenProblem
{
 public:
                cEigenHQR ( void );
  virtual      ~cEigenHQR ( void );
          void  EigenValue( int, int *, double **, double **,
                            double *, double ** );
 private:
  void HouseHolder  ( int, double **,double ** );   
  void MountHhMatrix( int, double ,double *, double *, double ** );
  void MountWVector ( int, int, double **, double * );
  void QR           ( int, double **, double * );

};

#endif
 

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