Adapter class for creating an operators often used in solving generalized eigenproblems. More...

#include <AnasaziEpetraAdapter.hpp>

Inheritance diagram for Anasazi::EpetraGenOp:

Public Member Functions
	EpetraGenOp (const Teuchos::RCP< Epetra_Operator > &AOp, const Teuchos::RCP< Epetra_Operator > &MOp, bool isAInverse=true)
	Basic constructor for applying operator $A^{-1}M$ [default] or . More...

	~EpetraGenOp ()
	Destructor. More...

void	Apply (const MultiVec< double > &X, MultiVec< double > &Y) const
	Apply method [inherited from Anasazi::Operator class]. More...

int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Apply method [inherited from Epetra_Operator class]. More...

int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
	Apply inverse method [inherited from Epetra_Operator class]. More...

const char *	Label () const
	Returns a character string describing the operator. More...

bool	UseTranspose () const
	Returns the current UseTranspose setting [always false for this operator]. More...

int	SetUseTranspose (bool)
	If set true, the transpose of this operator will be applied [not functional for this operator]. More...

bool	HasNormInf () const
	Returns true if this object can provide an approximate inf-norm [always false for this operator]. More...

double	NormInf () const
	Returns the infinity norm of the global matrix [not functional for this operator]. More...

const Epetra_Comm &	Comm () const
	Returns the Epetra_Comm communicator associated with this operator. More...

const Epetra_Map &	OperatorDomainMap () const
	Returns the Epetra_Map object associated with the domain of this operator. More...

const Epetra_Map &	OperatorRangeMap () const
	Returns the Epetra_Map object associated with the range of this operator. More...

Public Member Functions inherited from Anasazi::Operator< double >
	Operator ()
	Default constructor. More...

virtual	~Operator ()
	Destructor. More...

Detailed Description

Adapter class for creating an operators often used in solving generalized eigenproblems.

This class will apply the operation $A^{-1}M$ [default] or $AM$ , for the Apply method of the Epetra_Operator / Anasazi::Operator. The Anasazi::EpetraGenOp operator is useful when spectral transformations are used within eigensolvers. For instance, $A^{-1}M$ is a shift and invert spectral transformation commonly used with Anasazi::BlockKrylovSchur to compute the smallest-magnitude eigenvalues for the eigenproblem $Ax = \lambda Mx$ .

Note: The Epetra package performs double-precision arithmetic, so the use of Epetra with Anasazi will only provide a double-precision eigensolver.

Examples:: BlockKrylovSchur/BlockKrylovSchurEpetraExGenAztecOO.cpp, and BlockKrylovSchur/BlockKrylovSchurEpetraExGenBelos.cpp.

Definition at line 396 of file AnasaziEpetraAdapter.hpp.

Constructor & Destructor Documentation

Anasazi::EpetraGenOp::EpetraGenOp	(	const Teuchos::RCP< Epetra_Operator > &	AOp,
		const Teuchos::RCP< Epetra_Operator > &	MOp,
		bool	isAInverse = `true`
	)