LOCA::Epetra::TransposeLinearSystem::LeftPreconditioning Class Reference

Method for solving the transpose of a linear system by transposing the preconditioner and switching to left preconditioning. More...

#include <LOCA_Epetra_TransposeLinearSystem_LeftPreconditioning.H>

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List of all members.

Public Member Functions

 LeftPreconditioning (const Teuchos::RCP< LOCA::GlobalData > &global_data, const Teuchos::RCP< Teuchos::ParameterList > &solverParams, const Teuchos::RCP< NOX::Epetra::LinearSystem > &linsys)
 Constructor.
virtual ~LeftPreconditioning ()
 Destructor.
virtual bool applyJacobianTransposeInverse (Teuchos::ParameterList &params, const NOX::Epetra::Vector &input, NOX::Epetra::Vector &result)
 Applies the inverse of the Jacobian matrix transpose to the given input vector and puts the answer in result.
virtual bool createJacobianTranspose ()
 Evaluates the Jacobian-transpose based on the solution vector x.
virtual bool createTransposePreconditioner (const NOX::Epetra::Vector &x, Teuchos::ParameterList &p)
 Explicitly constructs a preconditioner based on the solution vector x and the parameter list p.
virtual Teuchos::RCP
< Epetra_Operator
getJacobianTransposeOperator ()
 Get Jacobian-transpose operator.
virtual Teuchos::RCP
< Epetra_Operator
getTransposePreconditioner ()
 Get transpose-preconditioner.
virtual void setJacobianTransposeOperator (const Teuchos::RCP< Epetra_Operator > &new_jac_trans)
 Set Jacobian-transpose operator.
virtual void setTransposePreconditioner (const Teuchos::RCP< Epetra_Operator > &new_prec_trans)
 Set transpose-preconditioner.

Protected Attributes

Teuchos::RCP< LOCA::GlobalDataglobalData
 Global data object.
Teuchos::RCP
< NOX::Epetra::LinearSystem
linsys
 Linear system solver.
Teuchos::RCP< Epetra_Operatorjac
 Jacobian operator.
Teuchos::RCP< Epetra_Operatorprec
 Preconditioner.

Detailed Description

Method for solving the transpose of a linear system by transposing the preconditioner and switching to left preconditioning.


Member Function Documentation

bool LOCA::Epetra::TransposeLinearSystem::LeftPreconditioning::applyJacobianTransposeInverse ( Teuchos::ParameterList params,
const NOX::Epetra::Vector input,
NOX::Epetra::Vector result 
) [virtual]

Applies the inverse of the Jacobian matrix transpose to the given input vector and puts the answer in result.

Computes

\[ v = J^{-T} u, \]

where $J$ is the Jacobian, $u$ is the input vector, and $v$ is the result vector.

The parameter list contains the linear solver options.

Implements LOCA::Epetra::TransposeLinearSystem::AbstractStrategy.

References NOX::Epetra::Vector::getEpetraVector(), jac, linsys, prec, and Teuchos::rcp().

bool LOCA::Epetra::TransposeLinearSystem::LeftPreconditioning::createJacobianTranspose (  )  [virtual]

Evaluates the Jacobian-transpose based on the solution vector x.

Note: For flexibility, this method does not compute the original Jacobian matrix. It uses whatever is currently stored in the linear system.

Implements LOCA::Epetra::TransposeLinearSystem::AbstractStrategy.

References jac, and linsys.

bool LOCA::Epetra::TransposeLinearSystem::LeftPreconditioning::createTransposePreconditioner ( const NOX::Epetra::Vector x,
Teuchos::ParameterList p 
) [virtual]

Explicitly constructs a preconditioner based on the solution vector x and the parameter list p.

Note: x is only needed for user-supplied preconditioners. When using a built-in preconditioner (e.g., Ifpack), x will note be used.

Implements LOCA::Epetra::TransposeLinearSystem::AbstractStrategy.

References jac, linsys, and prec.


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