gsINSPrecondBlockFmod< T, MatOrder > Class Template Reference

Detailed Description

template<class T, int MatOrder>
class gismo::gsINSPrecondBlockFmod< T, MatOrder >

Base class for block F of (modified) block preconditioner of the form.

\[ \left[ \begin{array}{cc} F & B^T \\ 0 & S \end{array} \right], \]

.

Implements action of \fF^{-1}\f. Assumes that the block F is not block-diagonal, solves a system with lower block-triangular submatrix of F (neglects the upper triangle).

Inheritance diagram for gsINSPrecondBlockFmod< T, MatOrder >:

Collaboration diagram for gsINSPrecondBlockFmod< T, MatOrder >:

Public Member Functions
void	apply (const gsMatrix< T > &input, gsMatrix< T > &x) const
	Apply the block. Computes the vector \fx = F^{-1} y\f.
int	cols () const
	Returns the number of columns of the block.
gsSparseSolver< T > *	createLinSolver ()
	Returns a pointer to new linear solver (direct or iterative).
virtual std::string	getName () const
	Returns the block name as a string.
	gsINSPrecondBlockFmod (const gsSparseMatrix< T, MatOrder > &matNS, const gsOptionList &opt)
	Constructor.
int	rows () const
	Returns the number of rows of the block.
virtual void	setOptions (const gsOptionList &)
	Set options based on a gsOptionList object.
void	setupLinSolver (gsSparseSolver< T > &solver)
	Set up the linear solver for the block.

Static Public Member Functions
static gsOptionList	defaultOptions ()
	Get the default options as gsOptionList object.
static gsIdentityOp< T >	Identity (const index_t dim)
	Identity operator.
static uPtr	make (const gsSparseMatrix< T, MatOrder > &matNS, const gsOptionList &opt)
	Returns a unique pointer to a newly created instance.

Constructor & Destructor Documentation

gsINSPrecondBlockFmod()

template<class T , int MatOrder>

gsINSPrecondBlockFmod ( const gsSparseMatrix< T, MatOrder > &  matNS, const gsOptionList &  opt  )

inline

Constructor.

Parameters

[in]	matNS	a const reference to the saddle-point system matrix
[in]	opt	a list of options for the preconditioner

Member Function Documentation

apply()

template<class T , int MatOrder>

void apply ( const gsMatrix< T > &  input, gsMatrix< T > &  x  ) const

virtual

Apply the block. Computes the vector \fx = F^{-1} y\f.

Parameters

[in]	input	a const reference the vector \f y \f
[out]	x	a reference to the resulting vector \f x \f

Implements gsLinearOperator< T >.

make()

template<class T , int MatOrder>

static uPtr make ( const gsSparseMatrix< T, MatOrder > &  matNS, const gsOptionList &  opt  )

inlinestatic

Returns a unique pointer to a newly created instance.

Parameters

[in]	matNS	a const reference to the saddle-point system matrix
[in]	opt	a list of options for the preconditioner

setupLinSolver()

template<class T >

void setupLinSolver ( gsSparseSolver< T > &  solver )

inherited

Set up the linear solver for the block.

Parameters

[out]

solver

a reference to the solver object