la_lapack::stein Interface Reference

STEIN: computes the eigenvectors of a real symmetric tridiagonal matrix T corresponding to specified eigenvalues, using inverse iteration. The maximum number of iterations allowed for each eigenvector is specified by an internal parameter MAXITS (currently set to 5). Although the eigenvectors are real, they are stored in a complex array, which may be passed to CUNMTR or CUPMTR for back transformation to the eigenvectors of a complex Hermitian matrix which was reduced to tridiagonal form. More...

Public Member Functions
pure subroutine	cstein (n, d, e, m, w, iblock, isplit, z, ldz, work, iwork, ifail, info)
	la_cstein
pure subroutine	dstein (n, d, e, m, w, iblock, isplit, z, ldz, work, iwork, ifail, info)
	la_dstein
	la_qstein
pure subroutine	sstein (n, d, e, m, w, iblock, isplit, z, ldz, work, iwork, ifail, info)
	la_sstein
	la_wstein
pure subroutine	zstein (n, d, e, m, w, iblock, isplit, z, ldz, work, iwork, ifail, info)
	la_zstein

Detailed Description

STEIN: computes the eigenvectors of a real symmetric tridiagonal matrix T corresponding to specified eigenvalues, using inverse iteration. The maximum number of iterations allowed for each eigenvector is specified by an internal parameter MAXITS (currently set to 5). Although the eigenvectors are real, they are stored in a complex array, which may be passed to CUNMTR or CUPMTR for back transformation to the eigenvectors of a complex Hermitian matrix which was reduced to tridiagonal form.

Member Function/Subroutine Documentation

cstein()

pure subroutine la_lapack::stein::cstein	(	integer(ilp), intent(in)	n,
		real(sp), dimension(*), intent(in)	d,
		real(sp), dimension(*), intent(in)	e,
		integer(ilp), intent(in)	m,
		real(sp), dimension(*), intent(in)	w,
		integer(ilp), dimension(*), intent(in)	iblock,
		integer(ilp), dimension(*), intent(in)	isplit,
		complex(sp), dimension(ldz,*), intent(out)	z,
		integer(ilp), intent(in)	ldz,
		real(sp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), dimension(*), intent(out)	ifail,
		integer(ilp), intent(out)	info
	)

dstein()

pure subroutine la_lapack::stein::dstein	(	integer(ilp), intent(in)	n,
		real(dp), dimension(*), intent(in)	d,
		real(dp), dimension(*), intent(in)	e,
		integer(ilp), intent(in)	m,
		real(dp), dimension(*), intent(in)	w,
		integer(ilp), dimension(*), intent(in)	iblock,
		integer(ilp), dimension(*), intent(in)	isplit,
		real(dp), dimension(ldz,*), intent(out)	z,
		integer(ilp), intent(in)	ldz,
		real(dp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), dimension(*), intent(out)	ifail,
		integer(ilp), intent(out)	info
	)

la_cstein()

la_lapack::stein::la_cstein

la_dstein()

la_lapack::stein::la_dstein

la_qstein()

la_lapack::stein::la_qstein

la_sstein()

la_lapack::stein::la_sstein

la_wstein()

la_lapack::stein::la_wstein

la_zstein()

la_lapack::stein::la_zstein

sstein()

pure subroutine la_lapack::stein::sstein	(	integer(ilp), intent(in)	n,
		real(sp), dimension(*), intent(in)	d,
		real(sp), dimension(*), intent(in)	e,
		integer(ilp), intent(in)	m,
		real(sp), dimension(*), intent(in)	w,
		integer(ilp), dimension(*), intent(in)	iblock,
		integer(ilp), dimension(*), intent(in)	isplit,
		real(sp), dimension(ldz,*), intent(out)	z,
		integer(ilp), intent(in)	ldz,
		real(sp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), dimension(*), intent(out)	ifail,
		integer(ilp), intent(out)	info
	)

zstein()

pure subroutine la_lapack::stein::zstein	(	integer(ilp), intent(in)	n,
		real(dp), dimension(*), intent(in)	d,
		real(dp), dimension(*), intent(in)	e,
		integer(ilp), intent(in)	m,
		real(dp), dimension(*), intent(in)	w,
		integer(ilp), dimension(*), intent(in)	iblock,
		integer(ilp), dimension(*), intent(in)	isplit,
		complex(dp), dimension(ldz,*), intent(out)	z,
		integer(ilp), intent(in)	ldz,
		real(dp), dimension(*), intent(out)	work,
		integer(ilp), dimension(*), intent(out)	iwork,
		integer(ilp), dimension(*), intent(out)	ifail,
		integer(ilp), intent(out)	info
	)

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

• la_lapack.f90