MueLu::QR_InterfaceEx< Scalar, LocalOrdinal > Class Template Reference

Interface to the Teuchos wrappers for LAPACK's QR. More...

#include <MueLu_QR_InterfaceEx_decl.hpp>

Private Member Functions
bool	isZeroNspColumn (LocalOrdinal const &myAggSize, ArrayRCP< Scalar > &localQR, LocalOrdinal nspCol)

Private Attributes
Teuchos::LAPACK< LocalOrdinal, Scalar >	lapack_
	Teuchos LAPACK wrapper. More...
LocalOrdinal	workSize_
	Length of work vectors. Must be at least dimension of nullspace. More...
LocalOrdinal	NSDim_
	Dimension of nullspace. More...
LocalOrdinal	internalNSDim_
LocalOrdinal	info_
	(out) =0: success; =i, i<0: i-th argument has illegal value More...
ArrayRCP< Scalar >	tau_
	Internal LAPACK variables. More...
ArrayRCP< Scalar >	work_
	Temporary work space. More...
ArrayRCP< Scalar >	internalLocalQR_
	internal local QR (without zero columns) More...
std::vector< LocalOrdinal >	nonZeroCols_

Constructors/Destructors.
	QR_InterfaceEx (const size_t nullSpaceDimension)
	Constructor. More...
virtual	~QR_InterfaceEx ()
	Destructor. More...

Computational methods.
void	Compute (LocalOrdinal const &myAggSize, ArrayRCP< Scalar > &localQR)
	Compute the QR factorization. More...
void	ExtractQ (LocalOrdinal const &myAggSize, ArrayRCP< Scalar > &localQR)
	Calculate the Q factor. More...

Detailed Description

template<class Scalar, class LocalOrdinal>
class MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >

Interface to the Teuchos wrappers for LAPACK's QR.

Used in the computation of the tentative prolongator during smoothed aggregation. Allows for specializations for Scalar types such as std::complex<double> and PCE.

Definition at line 25 of file MueLu_QR_InterfaceEx_decl.hpp.

Constructor & Destructor Documentation

QR_InterfaceEx()

template<class Scalar , class LocalOrdinal >

MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::QR_InterfaceEx

(

const size_t

nullSpaceDimension

)

Constructor.

Parameters

nullSpaceDimension

number of fine level nullspace vectors.

Definition at line 38 of file MueLu_QR_InterfaceEx_def.hpp.

~QR_InterfaceEx()

template<class Scalar , class LocalOrdinal >

virtual MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::~QR_InterfaceEx ( )

inlinevirtual

Destructor.

Definition at line 36 of file MueLu_QR_InterfaceEx_decl.hpp.

Member Function Documentation

Compute()

template<class Scalar , class LocalOrdinal >

void MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::Compute	(	LocalOrdinal const &	myAggSize,
		ArrayRCP< Scalar > &	localQR
	)

Compute the QR factorization.

Definition at line 56 of file MueLu_QR_InterfaceEx_def.hpp.

ExtractQ()

template<class Scalar , class LocalOrdinal >

void MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::ExtractQ	(	LocalOrdinal const &	myAggSize,
		ArrayRCP< Scalar > &	localQR
	)

Calculate the Q factor.

Parameters

[in]	myAggSize	number of points in current aggregate
[in,out]	localQR	array that on input implicitly contains the factorization calculated by Compute. On output, this array explicitly contains Q.

Definition at line 139 of file MueLu_QR_InterfaceEx_def.hpp.

isZeroNspColumn()

template<class Scalar , class LocalOrdinal >

bool MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::isZeroNspColumn ( LocalOrdinal const &  myAggSize, ArrayRCP< Scalar > &  localQR, LocalOrdinal  nspCol  )

private

Definition at line 44 of file MueLu_QR_InterfaceEx_def.hpp.

Member Data Documentation

lapack_

template<class Scalar , class LocalOrdinal >

Teuchos::LAPACK<LocalOrdinal,Scalar> MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::lapack_

private

Teuchos LAPACK wrapper.

Definition at line 57 of file MueLu_QR_InterfaceEx_decl.hpp.

workSize_

template<class Scalar , class LocalOrdinal >

LocalOrdinal MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::workSize_

private

Length of work vectors. Must be at least dimension of nullspace.

Definition at line 59 of file MueLu_QR_InterfaceEx_decl.hpp.

NSDim_

template<class Scalar , class LocalOrdinal >

LocalOrdinal MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::NSDim_

private

Dimension of nullspace.

Definition at line 61 of file MueLu_QR_InterfaceEx_decl.hpp.

internalNSDim_

template<class Scalar , class LocalOrdinal >

LocalOrdinal MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::internalNSDim_

private

Definition at line 63 of file MueLu_QR_InterfaceEx_decl.hpp.

info_

template<class Scalar , class LocalOrdinal >

LocalOrdinal MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::info_

private

(out) =0: success; =i, i<0: i-th argument has illegal value

Definition at line 65 of file MueLu_QR_InterfaceEx_decl.hpp.

tau_

template<class Scalar , class LocalOrdinal >

ArrayRCP<Scalar> MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::tau_

private

Internal LAPACK variables.

Definition at line 67 of file MueLu_QR_InterfaceEx_decl.hpp.

work_

template<class Scalar , class LocalOrdinal >

ArrayRCP<Scalar> MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::work_

private

Temporary work space.

Definition at line 69 of file MueLu_QR_InterfaceEx_decl.hpp.

internalLocalQR_

template<class Scalar , class LocalOrdinal >

ArrayRCP<Scalar> MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::internalLocalQR_

private

internal local QR (without zero columns)

Definition at line 72 of file MueLu_QR_InterfaceEx_decl.hpp.

nonZeroCols_

template<class Scalar , class LocalOrdinal >

std::vector<LocalOrdinal> MueLu::QR_InterfaceEx< Scalar, LocalOrdinal >::nonZeroCols_

private

Definition at line 74 of file MueLu_QR_InterfaceEx_decl.hpp.

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

• MueLu_QR_InterfaceEx_decl.hpp
• MueLu_QR_InterfaceEx_def.hpp