Eigenvalue solver using LaPack routine dgeev (Real) zgeev (Cmplx). More...

#include <SmallES.hh>

Inheritance diagram for eigensolver::SmallES< F >:

Collaboration diagram for eigensolver::SmallES< F >:

Public Member Functions
virtual uint	converged () const
	Returns the number of converged eigenpairs: (not implemented)
virtual const concepts::Array < concepts::Vector< F > * > &	getEF ()
	Returns an array with the eigenfunctions.
virtual const concepts::Array < F > &	getEV ()
	Returns an array with the real parts of the eigenvalues in the first `kmax` entries and the imaginary parts of the eigenvalues in the second `kmax` entries for real matrices and returns a complex array containing the eigenvalues for complex matrices.
virtual uint	iterations () const
	Returns the number of iterations.
	SmallES (concepts::Array< F > &A)
	Constructor.
virtual	~SmallES ()
	Destructor.
Protected Member Functions
virtual std::ostream &	info (std::ostream &os) const
	Returns information in an output stream.
Private Member Functions
void	compute_ ()
	Compute eigenpairs.
Private Attributes
concepts::Array< F > &	A_
	Array A as described in `modus`.
bool	computed_
	Eigenpairs computed?
concepts::Array< F >	eigenvalues_
	Storage space for eigenvalues.
concepts::Array < concepts::Vector< F > * >	eigenvectors_
	Storage for eigenvectors.

Detailed Description

template<typename F>
class eigensolver::SmallES< F >

Eigenvalue solver using LaPack routine dgeev (Real) zgeev (Cmplx).

This solver is intended to be applied to "small" general N by N matrices, e.g. for the eigenvalue computation in the DirPotIt routine. For Sparse matrices / big eigenvalue problems consider the ArPack routines. As input this solver needs an array which represents the columnwise stored matrix: array(column 1, column 2,... column n).

Author:: Peter Kauf, 2005

Definition at line 25 of file SmallES.hh.

Constructor & Destructor Documentation

template<typename F >

eigensolver::SmallES< F >::SmallES ( concepts::Array< F > & A )

Constructor.

Parameters:

A	Array A is the matrix of which the eigenpairs have to be computed.

template<typename F >

virtual eigensolver::SmallES< F >::~SmallES ( ) [virtual]

Destructor.

Member Function Documentation

template<typename F >

void eigensolver::SmallES< F >::compute_ ( ) [private]

Compute eigenpairs.

template<typename F >

virtual uint eigensolver::SmallES< F >::converged ( ) const [inline, virtual]

Returns the number of converged eigenpairs: (not implemented)

Implements eigensolver::EigenSolver< F >.

Definition at line 48 of file SmallES.hh.

template<typename F >

virtual const concepts::Array<concepts::Vector<F>*>& eigensolver::SmallES< F >::getEF ( ) [virtual]

Returns an array with the eigenfunctions.

Implements eigensolver::EigenSolver< F >.

template<typename F >

virtual const concepts::Array<F>& eigensolver::SmallES< F >::getEV ( ) [virtual]

Returns an array with the real parts of the eigenvalues in the first kmax entries and the imaginary parts of the eigenvalues in the second kmax entries for real matrices and returns a complex array containing the eigenvalues for complex matrices.

The last entry in both cases is the optimal size of the work array.

Implements eigensolver::EigenSolver< F >.

template<typename F >

virtual std::ostream& eigensolver::SmallES< F >::info ( std::ostream & os ) const [protected, virtual]

Returns information in an output stream.

Reimplemented from eigensolver::EigenSolver< F >.

template<typename F >

virtual uint eigensolver::SmallES< F >::iterations ( ) const [inline, virtual]

Returns the number of iterations.

Implements eigensolver::EigenSolver< F >.

Definition at line 46 of file SmallES.hh.