Epetra_Operator Class Reference

Epetra_Operator: A pure virtual class for using real-valued double-precision operators. More...

#include <Epetra_Operator.h>

Inheritance diagram for Epetra_Operator:

Public Member Functions
Destructor
virtual	~Epetra_Operator ()
	Destructor.
Attribute set methods
virtual int	SetUseTranspose (bool UseTranspose)=0
	If set true, transpose of this operator will be applied. More...
Mathematical functions
virtual int	Apply (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const =0
	Returns the result of a Epetra_Operator applied to a Epetra_MultiVector X in Y. More...
virtual int	ApplyInverse (const Epetra_MultiVector &X, Epetra_MultiVector &Y) const =0
	Returns the result of a Epetra_Operator inverse applied to an Epetra_MultiVector X in Y. More...
virtual double	NormInf () const =0
	Returns the infinity norm of the global matrix.
Attribute access functions
virtual const char *	Label () const =0
	Returns a character string describing the operator.
virtual bool	UseTranspose () const =0
	Returns the current UseTranspose setting.
virtual bool	HasNormInf () const =0
	Returns true if the this object can provide an approximate Inf-norm, false otherwise.
virtual const Epetra_Comm &	Comm () const =0
	Returns a pointer to the Epetra_Comm communicator associated with this operator.
virtual const Epetra_Map &	OperatorDomainMap () const =0
	Returns the Epetra_Map object associated with the domain of this operator.
virtual const Epetra_Map &	OperatorRangeMap () const =0
	Returns the Epetra_Map object associated with the range of this operator.

Detailed Description

Epetra_Operator: A pure virtual class for using real-valued double-precision operators.

The Epetra_Operator class is a pure virtual class (specifies interface only) that enable the use of real-valued double-precision operators. It is currently implemented by both the Epetra_CrsMatrix and Epetra_VbrMatrix classes and the Ifpack_CrsRiluk preconditioner class.

Member Function Documentation

virtual int Epetra_Operator::Apply ( const Epetra_MultiVector &  X, Epetra_MultiVector &  Y  ) const

pure virtual

Returns the result of a Epetra_Operator applied to a Epetra_MultiVector X in Y.

Parameters

In	X - A Epetra_MultiVector of dimension NumVectors to multiply with matrix.
Out	Y -A Epetra_MultiVector of dimension NumVectors containing result.

Returns

Integer error code, set to 0 if successful.

Implemented in Epetra_CrsMatrix, Epetra_VbrMatrix, Epetra_BasicRowMatrix, Epetra_MsrMatrix, Epetra_FastCrsOperator, and Epetra_InvOperator.

Referenced by Epetra_InvOperator::ApplyInverse().

virtual int Epetra_Operator::ApplyInverse ( const Epetra_MultiVector &  X, Epetra_MultiVector &  Y  ) const

pure virtual

Returns the result of a Epetra_Operator inverse applied to an Epetra_MultiVector X in Y.

Parameters

In	X - A Epetra_MultiVector of dimension NumVectors to solve for.
Out	Y -A Epetra_MultiVector of dimension NumVectors containing result.

Returns

Integer error code, set to 0 if successful.

Warning

In order to work with AztecOO, any implementation of this method must support the case where X and Y are the same object.

Implemented in Epetra_CrsMatrix, Epetra_VbrMatrix, Epetra_BasicRowMatrix, Epetra_MsrMatrix, Epetra_FastCrsOperator, and Epetra_InvOperator.

Referenced by Epetra_InvOperator::Apply().

virtual int Epetra_Operator::SetUseTranspose ( bool  UseTranspose )

pure virtual

If set true, transpose of this operator will be applied.

This flag allows the transpose of the given operator to be used implicitly.  Setting this flag
affects only the Apply() and ApplyInverse() methods.  If the implementation of this interface

does not support transpose use, this method should return a value of -1.

Parameters

In	UseTranspose -If true, multiply by the transpose of operator, otherwise just use operator.

Returns

Integer error code, set to 0 if successful. Set to -1 if this implementation does not support transpose.

Implemented in Epetra_CrsMatrix, Epetra_VbrMatrix, Epetra_BasicRowMatrix, Epetra_MsrMatrix, Epetra_FastCrsOperator, and Epetra_InvOperator.

Referenced by Epetra_InvOperator::SetUseTranspose().

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The documentation for this class was generated from the following file:

• Epetra_Operator.h