class HCL_ItEigSolver_d : public HCL_Base

Abstract base class for iterative eigenvalue solvers

Inheritance:

Public

Methods virtual int Solve ( int &nev, HCL_LinearOp_d &A, HCL_Vector_d &x ) Solve A*x = lambda*x virtual int EigPair (int i, double &eigr, double &eigi, HCL_Vector_d *vr, HCL_Vector_d *vi) Access to eigenvalues and eigenvectors computed by Solve() virtual int EigPair (int i, double &eigr, HCL_Vector_d *vr ) Access to (real part of) eigenpairs computed by Solve() virtual int Eigenvalue ( int i, double &eigr, double &eigi ) Access to eigenvalues computed by Solve() virtual int Eigenvalue ( int i, double &eigr ) Access to (real part of) eigenvalues computed by Solve()

Inherited from HCL_Base:

Public Methods

void IncCount() const

void DecCount() const

int Count() const

virtual ostream& Write(ostream &) const

Methods

virtual int Solve( int &nev, HCL_LinearOp_d &A, HCL_Vector_d &x )

Solve A*x = lambda*x

Parameters:

nev - Number of eigenvalues wanted. On output this contains the number of eigenvalues actually computed.
A - Linear operator A.
x - Starting vector for iteration.

virtual int EigPair(int i, double &eigr, double &eigi, HCL_Vector_d *vr, HCL_Vector_d *vi)

Access to eigenvalues and eigenvectors computed by Solve()

Returns:

Nonzero if 'i' is not valid or if Solve() has not been called.

Parameters:

i - Which eigenpair to return. (Must be between 1 and the number of eigenvalues computed in Solve())
eigr - Returns the real part of the ith eigenvalue.
eigi - Returns the imaginary part of the ith eigenvalue.
vr - Returns the real part of the ith eigenvector.
vi - Returns the imaginary part of the ith eigenvector.

virtual int EigPair(int i, double &eigr, HCL_Vector_d *vr )

Access to (real part of) eigenpairs computed by Solve()

Returns:

Nonzero if 'i' is not valid or if Solve() has not been called.

Parameters:

i - Which eigenvalue to return. (Must be between 1 and the number of eigenvalues computed in Solve())
eigr - Returns the real part of the ith eigenvalue.
vr - Returns the real part of the ith eigenvector.

virtual int Eigenvalue( int i, double &eigr, double &eigi )

Access to eigenvalues computed by Solve()

Returns:

Nonzero if 'i' is not valid or if Solve() has not been called.

Parameters:

i - Which eigenvalue to return. (Must be between 1 and the number of eigenvalues computed in Solve())
eigr - Returns the real part of the ith eigenvalue.
eigi - Returns the imaginary part of the ith eigenvalue.

virtual int Eigenvalue( int i, double &eigr )

Access to (real part of) eigenvalues computed by Solve()

Returns:

Nonzero if 'i' is not valid or if Solve() has not been called.

Parameters:

i - Which eigenvalue to return. (Must be between 1 and the number of eigenvalues computed in Solve())
eigr - Returns the real part of the ith eigenvalue.

Direct child classes:

HCL_IRArnoldi_d

alphabetic index hierarchy of classes

this page has been generated automatically by doc++

(c)opyright by Malte Zöckler, Roland Wunderling
contact: doc++@zib.de