lambda_lanczos_tridiagonal_lapack.hpp File Reference

#include <vector>
#include <complex>
#include "lambda_lanczos_util.hpp"

Go to the source code of this file.

Namespaces
namespace	lambda_lanczos
namespace	lambda_lanczos::tridiagonal_lapack

Functions
lapack_int	lambda_lanczos::tridiagonal_lapack::stev (int matrix_layout, char jobz, lapack_int n, float *d, float *e, float *z, lapack_int ldz)
lapack_int	lambda_lanczos::tridiagonal_lapack::stev (int matrix_layout, char jobz, lapack_int n, double *d, double *e, double *z, lapack_int ldz)
template<typename T >
T	lambda_lanczos::tridiagonal_lapack::find_mth_eigenvalue (const std::vector< T > &alpha, const std::vector< T > &beta, const size_t index)
	Finds the mth smaller eigenvalue of given tridiagonal matrix. More...
template<typename T >
void	lambda_lanczos::tridiagonal_lapack::tridiagonal_eigenpairs (const std::vector< T > &alpha, const std::vector< T > &beta, std::vector< T > &eigenvalues, std::vector< std::vector< T > > &eigenvectors, bool compute_eigenvector=true)
	Computes all eigenpairs (eigenvalues and eigenvectors) for given tri-diagonal matrix. More...
template<typename T >
void	lambda_lanczos::tridiagonal_lapack::tridiagonal_eigenvalues (const std::vector< T > &alpha, const std::vector< T > &beta, std::vector< T > &eigenvalues)
	Computes all eigenvalues for given tri-diagonal matrix using the Implicitly Shifted QR algorithm. More...