Solves generalized Hermitian eigenvalue problem by the QR algorithm. More...

Private Member Functions
subroutine	scalafx_phegv_complex (aa, desca, bb, descb, ww, zz, descz, jobz, uplo, ia, ja, ib, jb, iz, jz, work, rwork, skipchol, info)
	Solves Hermitian generalized eigenvalue problem by the QR algorithm.

subroutine	scalafx_phegv_dcomplex (aa, desca, bb, descb, ww, zz, descz, jobz, uplo, ia, ja, ib, jb, iz, jz, work, rwork, skipchol, info)
	Solves Hermitian generalized eigenvalue problem by the QR algorithm.

Detailed Description

Solves generalized Hermitian eigenvalue problem by the QR algorithm.

Member Function/Subroutine Documentation

subroutine scalapackfx_module::scalafx_phegv::scalafx_phegv_complex	(	complex(sp), dimension(:,:), intent(inout)	aa,
		integer, dimension(dlen_), intent(in)	desca,
		complex(sp), dimension(:,:), intent(inout)	bb,
		integer, dimension(dlen_), intent(in)	descb,
		real(sp), dimension(:), intent(out)	ww,
		complex(sp), dimension(:,:), intent(out)	zz,
		integer, dimension(dlen_), intent(in)	descz,
		character, intent(in), optional	jobz,
		character, intent(in), optional	uplo,
		integer, intent(in), optional	ia,
		integer, intent(in), optional	ja,
		integer, intent(in), optional	ib,
		integer, intent(in), optional	jb,
		integer, intent(in), optional	iz,
		integer, intent(in), optional	jz,
		complex(sp), dimension(:), intent(inout), optional, allocatable	work,
		real(sp), dimension(:), intent(inout), optional, allocatable	rwork,
		logical, intent(in), optional	skipchol,
		integer, intent(out), optional	info
	)

private

Solves Hermitian generalized eigenvalue problem by the QR algorithm.

Invokes SCALAPACK routines p?potrf, p?hegst, p?heev, p?trsm in order to transform the general eigenvalue problem to the standard form and transform the eigenvectors back.

Parameters

aa	Matrix to diagonalize (A), transformed matrix on exit.
desca	Descriptor of matrix A.
bb	Matrix on the right hand side (B), transformed matrix on exit.
descb	Descriptor of matrix B.
ww	Eigenvalues on exit.
zz	Eigenvectors on exit (Z).
descz	Descriptor of the eigenvector matrix.
jobz	Job type (default: "V")
uplo	Upper or lower diagonal matrix (default: "L")
ia	First row of the submatrix A (default: 1)
ja	First column of the submatrix A (default: 1)
ib	First row of the submatrix B (default: 1)
jb	First column of the submatrix B (default: 1)
iz	First row of the submatrix Z (default: 1)
jz	First column of the submatrix Z (default: 1)
work	Complex working array (if not specified, allocated (automatically)
rwork	Real working array (if not specified, allocated automatically)
skipchol	If true, the Cholesky transformation will be skipped. Array bb must have the Cholesky transformed form.
info	Info flag. If not specified and SCALAPACK calls returns nozero, subroutine stops.

See Also: SCALAPACK documentation (routines p?potrf, p?hegst, p?heev, p?trsm).

subroutine scalapackfx_module::scalafx_phegv::scalafx_phegv_dcomplex	(	complex(dp), dimension(:,:), intent(inout)	aa,
		integer, dimension(dlen_), intent(in)	desca,
		complex(dp), dimension(:,:), intent(inout)	bb,
		integer, dimension(dlen_), intent(in)	descb,
		real(dp), dimension(:), intent(out)	ww,
		complex(dp), dimension(:,:), intent(out)	zz,
		integer, dimension(dlen_), intent(in)	descz,
		character, intent(in), optional	jobz,
		character, intent(in), optional	uplo,
		integer, intent(in), optional	ia,
		integer, intent(in), optional	ja,
		integer, intent(in), optional	ib,
		integer, intent(in), optional	jb,
		integer, intent(in), optional	iz,
		integer, intent(in), optional	jz,
		complex(dp), dimension(:), intent(inout), optional, allocatable	work,
		real(dp), dimension(:), intent(inout), optional, allocatable	rwork,
		logical, intent(in), optional	skipchol,
		integer, intent(out), optional	info
	)