Given the initial representation L D L^T and its cluster of close eigenvalues (in a relative measure), W( CLSTRT ), W( CLSTRT+1 ), ... W( CLEND ), LARRF: finds a new relatively robust representation L D L^T - SIGMA I = L(+) D(+) L(+)^T such that at least one of the eigenvalues of L(+) D(+) L(+)^T is relatively isolated. More...

Public Member Functions
pure subroutine	dlarrf (n, d, l, ld, clstrt, clend, w, wgap, werr, spdiam, clgapl, clgapr, pivmin, sigma, dplus, lplus, work, info)

	la_dlarrf

	la_qlarrf

pure subroutine	slarrf (n, d, l, ld, clstrt, clend, w, wgap, werr, spdiam, clgapl, clgapr, pivmin, sigma, dplus, lplus, work, info)

	la_slarrf

Detailed Description

Given the initial representation L D L^T and its cluster of close eigenvalues (in a relative measure), W( CLSTRT ), W( CLSTRT+1 ), ... W( CLEND ), LARRF: finds a new relatively robust representation L D L^T - SIGMA I = L(+) D(+) L(+)^T such that at least one of the eigenvalues of L(+) D(+) L(+)^T is relatively isolated.

Member Function/Subroutine Documentation

◆ dlarrf()

pure subroutine la_lapack::larrf::dlarrf	(	integer(ilp), intent(in)	n,
		real(dp), dimension(*), intent(in)	d,
		real(dp), dimension(*), intent(in)	l,
		real(dp), dimension(*), intent(in)	ld,
		integer(ilp), intent(in)	clstrt,
		integer(ilp), intent(in)	clend,
		real(dp), dimension(*), intent(in)	w,
		real(dp), dimension(*), intent(inout)	wgap,
		real(dp), dimension( *), intent(in)	werr,
		real(dp), intent(in)	spdiam,
		real(dp), intent(in)	clgapl,
		real(dp), intent(in)	clgapr,
		real(dp), intent(in)	pivmin,
		real(dp), intent(out)	sigma,
		real(dp), dimension(*), intent(out)	dplus,
		real(dp), dimension(*), intent(out)	lplus,
		real(dp), dimension(*), intent(out)	work,
		integer(ilp), intent(out)	info
	)

◆ la_dlarrf()

la_lapack::larrf::la_dlarrf

◆ la_qlarrf()

la_lapack::larrf::la_qlarrf

◆ la_slarrf()

la_lapack::larrf::la_slarrf

◆ slarrf()

pure subroutine la_lapack::larrf::slarrf	(	integer(ilp), intent(in)	n,
		real(sp), dimension(*), intent(in)	d,
		real(sp), dimension(*), intent(in)	l,
		real(sp), dimension(*), intent(in)	ld,
		integer(ilp), intent(in)	clstrt,
		integer(ilp), intent(in)	clend,
		real(sp), dimension(*), intent(in)	w,
		real(sp), dimension(*), intent(inout)	wgap,
		real(sp), dimension( *), intent(in)	werr,
		real(sp), intent(in)	spdiam,
		real(sp), intent(in)	clgapl,
		real(sp), intent(in)	clgapr,
		real(sp), intent(in)	pivmin,
		real(sp), intent(out)	sigma,
		real(sp), dimension(*), intent(out)	dplus,
		real(sp), dimension(*), intent(out)	lplus,
		real(sp), dimension(*), intent(out)	work,
		integer(ilp), intent(out)	info
	)

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

la_lapack.f90