lanczosn.h File Reference

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

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

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Classes
class	myra::Action< Number >
	Applies the "Action" of a linear operator, b := A*x. 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::lanczosN (const Action< float > &A, const CMatrixRange< float > &Q, int N, float tolerance, int iterations)
	Given operator A (and deflation space Q) finds N dominant eigenpairs of A.
std::pair< Matrix< double >, DiagonalMatrix< double > >	myra::lanczosN (const Action< double > &A, const CMatrixRange< double > &Q, int N, double tolerance, int iterations)

Detailed Description

Finds several dominant eigenpairs of a real symmetric Action.