Finds several small eigenpairs of a real symmetric Action. More...

#include <myramath/MYRAMATH_EXPORT.h>
#include <utility>

Include dependency graph for lopcgn.h:

Classes
class	myra::Action< Number >
	Applies the "Action" of a linear operator, b := A*x. More...

class	myra::Vector< Number >
	Tabulates a vector of length N, allows random access. More...

class	myra::Matrix< Number >
	Tabulates an IxJ matrix. Allows random access, has column major layout to be compatible with BLAS/LAPACK. More...

class	myra::CMatrixRange< Number >
	Represents a const MatrixRange. More...

class	myra::DiagonalMatrix< Number >
	Tabulates the values of a square NxN diagonal matrix. Allows random access, but only on the diagonal. More...

Functions
std::pair< Matrix< float >, DiagonalMatrix< float > >	myra::lopcgN (const Action< float > &M, const Action< float > &A, const CMatrixRange< float > &Q, int N, float tolerance=1.0e-4, int iterations=100)
	Finds N small eigenvectors of a symmetric matrix A, requires preconditioner M. Returns the eigenpairs, (1/Lambda,X)

std::pair< Matrix< double >, DiagonalMatrix< double > >	myra::lopcgN (const Action< double > &M, const Action< double > &A, const CMatrixRange< double > &Q, int N, double tolerance, int iterations)

Detailed Description

Finds several small eigenpairs of a real symmetric Action.

Classes