SLEPcWrappers::TransformationBase Class Reference

#include <deal.II/lac/slepc_spectral_transformation.h>

Inheritance diagram for SLEPcWrappers::TransformationBase:

Public Member Functions
virtual	~TransformationBase ()
void	set_matrix_mode (const STMatMode mode)
void	set_solver (const PETScWrappers::SolverBase &solver)

Protected Member Functions
	TransformationBase (const MPI_Comm &mpi_communicator)

Protected Attributes
ST	st

Friends
class	SolverBase

Detailed Description

Base class for spectral transformation classes using the SLEPc solvers which are selected based on flags passed to the spectral transformation.

SLEPcWrappers::TransformationXXX, where XXX is your favourite transformation type, can then be implemented in application codes in the following way for XXX=INVERT with the solver object eigensolver:

// Set a transformation, this one shifts the eigenspectrum by 3.142..
SLEPcWrappers::TransformationShift::AdditionalData additional_data (3.142);
SLEPcWrappers::TransformationShift shift (mpi_communicator,additional_data);
eigensolver.set_transformation (shift);

and later calling the solve() function as usual:

SolverControl solver_control (1000, 1e-9);
SolverArnoldi system (solver_control, mpi_communicator);
eigensolver.solve (A, B, lambda, x, size_of_spectrum);

Note

These options can also be set at the command line.

Author

Toby D. Young 2009, 2013; and Denis Davydov 2015.

Definition at line 70 of file slepc_spectral_transformation.h.

Constructor & Destructor Documentation

TransformationBase()

SLEPcWrappers::TransformationBase::TransformationBase ( const MPI_Comm &  mpi_communicator )

protected

Constructor.

Definition at line 32 of file slepc_spectral_transformation.cc.

~TransformationBase()

SLEPcWrappers::TransformationBase::~TransformationBase ( )

virtual

Destructor.

Definition at line 38 of file slepc_spectral_transformation.cc.

Member Function Documentation

set_matrix_mode()

void SLEPcWrappers::TransformationBase::set_matrix_mode

(

const STMatMode

mode

)

Set a flag to indicate how the transformed matrices are being stored in the spectral transformations.

The possible values are given by the enumerator STMatMode in the SLEPc library http://www.grycap.upv.es/slepc/documentation/current/docs/manualpages/ST/STMatMode.html

Definition at line 48 of file slepc_spectral_transformation.cc.

set_solver()

void SLEPcWrappers::TransformationBase::set_solver

(

const PETScWrappers::SolverBase &

solver

)

Set solver to be used when solving a system of linear algebraic equations inside the eigensolver.

Definition at line 54 of file slepc_spectral_transformation.cc.

Friends And Related Function Documentation

SolverBase

friend class SolverBase

friend

Make the solver class a friend, since it needs to set spectral transformation object.

Definition at line 112 of file slepc_spectral_transformation.h.

Member Data Documentation

st

ST SLEPcWrappers::TransformationBase::st

protected

SLEPc spectral transformation object.

Definition at line 106 of file slepc_spectral_transformation.h.

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

• deal.II/lac/slepc_spectral_transformation.h
• source/lac/slepc_spectral_transformation.cc