ggbak Interface

public interface ggbak

GGBAK forms the right or left eigenvectors of a complex generalized eigenvalue problem Ax = lambdaB*x, by backward transformation on the computed eigenvectors of the balanced pair of matrices output by CGGBAL.

Subroutines

public pure subroutine cggbak(job, side, n, ilo, ihi, lscale, rscale, m, v, ldv, info)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	job
character(len=1),	intent(in)			::	side
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	ilo
integer(kind=ilp),	intent(in)			::	ihi
real(kind=sp),	intent(in)			::	lscale(*)
real(kind=sp),	intent(in)			::	rscale(*)
integer(kind=ilp),	intent(in)			::	m
complex(kind=sp),	intent(inout)			::	v(ldv,*)
integer(kind=ilp),	intent(in)			::	ldv
integer(kind=ilp),	intent(out)			::	info

public pure subroutine dggbak(job, side, n, ilo, ihi, lscale, rscale, m, v, ldv, info)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	job
character(len=1),	intent(in)			::	side
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	ilo
integer(kind=ilp),	intent(in)			::	ihi
real(kind=dp),	intent(in)			::	lscale(*)
real(kind=dp),	intent(in)			::	rscale(*)
integer(kind=ilp),	intent(in)			::	m
real(kind=dp),	intent(inout)			::	v(ldv,*)
integer(kind=ilp),	intent(in)			::	ldv
integer(kind=ilp),	intent(out)			::	info

public pure subroutine sggbak(job, side, n, ilo, ihi, lscale, rscale, m, v, ldv, info)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	job
character(len=1),	intent(in)			::	side
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	ilo
integer(kind=ilp),	intent(in)			::	ihi
real(kind=sp),	intent(in)			::	lscale(*)
real(kind=sp),	intent(in)			::	rscale(*)
integer(kind=ilp),	intent(in)			::	m
real(kind=sp),	intent(inout)			::	v(ldv,*)
integer(kind=ilp),	intent(in)			::	ldv
integer(kind=ilp),	intent(out)			::	info

public pure subroutine zggbak(job, side, n, ilo, ihi, lscale, rscale, m, v, ldv, info)

Arguments

Type	Intent	Optional	Attributes		Name
character(len=1),	intent(in)			::	job
character(len=1),	intent(in)			::	side
integer(kind=ilp),	intent(in)			::	n
integer(kind=ilp),	intent(in)			::	ilo
integer(kind=ilp),	intent(in)			::	ihi
real(kind=dp),	intent(in)			::	lscale(*)
real(kind=dp),	intent(in)			::	rscale(*)
integer(kind=ilp),	intent(in)			::	m
complex(kind=dp),	intent(inout)			::	v(ldv,*)
integer(kind=ilp),	intent(in)			::	ldv
integer(kind=ilp),	intent(out)			::	info

Module Procedures

public interface stdlib_cggbak()

Arguments

None

public interface stdlib_dggbak()

Arguments

None

public interface stdlib_sggbak()

Arguments

None

public interface stdlib_zggbak()

Arguments

None