Eigen::PastixLDLT< _MatrixType, _UpLo > Class Template Reference

A sparse direct supernodal Cholesky (LLT) factorization and solver based on the PaStiX library. More...

#include <PaStiXSupport.h>

Public Types
enum	{ UpLo = _UpLo }
typedef _MatrixType	MatrixType
typedef PastixBase< PastixLDLT< MatrixType, _UpLo > >	Base
typedef Base::ColSpMatrix	ColSpMatrix

Public Member Functions
	PastixLDLT (const MatrixType &matrix)
void	compute (const MatrixType &matrix)
void	analyzePattern (const MatrixType &matrix)
void	factorize (const MatrixType &matrix)

Protected Member Functions
void	init ()
void	grabMatrix (const MatrixType &matrix, ColSpMatrix &out)

Protected Attributes
Array< int, IPARM_SIZE, 1 >	m_iparm

Detailed Description

template<typename _MatrixType, int _UpLo>
class Eigen::PastixLDLT< _MatrixType, _UpLo >

A sparse direct supernodal Cholesky (LLT) factorization and solver based on the PaStiX library.

This class is used to solve the linear systems A.X = B via a LDL^T supernodal Cholesky factorization available in the PaStiX library. The matrix A should be symmetric and positive definite WARNING Selfadjoint complex matrices are not supported in the current version of PaStiX The vectors or matrices X and B can be either dense or sparse

Template Parameters

MatrixType	the type of the sparse matrix A, it must be a SparseMatrix<>
UpLo	The part of the matrix to use : Lower or Upper. The default is Lower as required by PaStiX

\implsparsesolverconcept

See also

TutorialSparseSolverConcept, class SimplicialLDLT

Member Function Documentation

analyzePattern()

template<typename _MatrixType , int _UpLo>

void Eigen::PastixLDLT< _MatrixType, _UpLo >::analyzePattern ( const MatrixType &  matrix )

inline

Compute the LDL^T symbolic factorization of matrix using its sparsity pattern The result of this operation can be used with successive matrices having the same pattern as matrix

See also

factorize()

compute()

template<typename _MatrixType , int _UpLo>

void Eigen::PastixLDLT< _MatrixType, _UpLo >::compute ( const MatrixType &  matrix )

inline

Compute the L and D factors of the LDL^T factorization of matrix

See also

analyzePattern() factorize()

factorize()

template<typename _MatrixType , int _UpLo>

void Eigen::PastixLDLT< _MatrixType, _UpLo >::factorize ( const MatrixType &  matrix )

inline

Compute the LDL^T supernodal numerical factorization of matrix

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

• PaStiXSupport.h