gebrd Interface

public interface gebrd

GEBRD reduces a general complex M-by-N matrix A to upper or lower bidiagonal form B by a unitary transformation: Q**H * A * P = B. If m >= n, B is upper bidiagonal; if m < n, B is lower bidiagonal.

Subroutines

public pure subroutine cgebrd(m, n, a, lda, d, e, tauq, taup, work, lwork, info)

Arguments

Type	Intent	Optional	Attributes		Name
integer(kind=ilp),	intent(in)			::	m
integer(kind=ilp),	intent(in)			::	n
complex(kind=sp),	intent(inout)			::	a(lda,*)
integer(kind=ilp),	intent(in)			::	lda
real(kind=sp),	intent(out)			::	d(*)
real(kind=sp),	intent(out)			::	e(*)
complex(kind=sp),	intent(out)			::	tauq(*)
complex(kind=sp),	intent(out)			::	taup(*)
complex(kind=sp),	intent(out)			::	work(*)
integer(kind=ilp),	intent(in)			::	lwork
integer(kind=ilp),	intent(out)			::	info

public pure subroutine dgebrd(m, n, a, lda, d, e, tauq, taup, work, lwork, info)

Arguments

Type	Intent	Optional	Attributes		Name
integer(kind=ilp),	intent(in)			::	m
integer(kind=ilp),	intent(in)			::	n
real(kind=dp),	intent(inout)			::	a(lda,*)
integer(kind=ilp),	intent(in)			::	lda
real(kind=dp),	intent(out)			::	d(*)
real(kind=dp),	intent(out)			::	e(*)
real(kind=dp),	intent(out)			::	tauq(*)
real(kind=dp),	intent(out)			::	taup(*)
real(kind=dp),	intent(out)			::	work(*)
integer(kind=ilp),	intent(in)			::	lwork
integer(kind=ilp),	intent(out)			::	info

public pure subroutine sgebrd(m, n, a, lda, d, e, tauq, taup, work, lwork, info)

Arguments

Type	Intent	Optional	Attributes		Name
integer(kind=ilp),	intent(in)			::	m
integer(kind=ilp),	intent(in)			::	n
real(kind=sp),	intent(inout)			::	a(lda,*)
integer(kind=ilp),	intent(in)			::	lda
real(kind=sp),	intent(out)			::	d(*)
real(kind=sp),	intent(out)			::	e(*)
real(kind=sp),	intent(out)			::	tauq(*)
real(kind=sp),	intent(out)			::	taup(*)
real(kind=sp),	intent(out)			::	work(*)
integer(kind=ilp),	intent(in)			::	lwork
integer(kind=ilp),	intent(out)			::	info

public pure subroutine zgebrd(m, n, a, lda, d, e, tauq, taup, work, lwork, info)

Arguments

Type	Intent	Optional	Attributes		Name
integer(kind=ilp),	intent(in)			::	m
integer(kind=ilp),	intent(in)			::	n
complex(kind=dp),	intent(inout)			::	a(lda,*)
integer(kind=ilp),	intent(in)			::	lda
real(kind=dp),	intent(out)			::	d(*)
real(kind=dp),	intent(out)			::	e(*)
complex(kind=dp),	intent(out)			::	tauq(*)
complex(kind=dp),	intent(out)			::	taup(*)
complex(kind=dp),	intent(out)			::	work(*)
integer(kind=ilp),	intent(in)			::	lwork
integer(kind=ilp),	intent(out)			::	info

Module Procedures

public interface stdlib_cgebrd()

Arguments

None

public interface stdlib_dgebrd()

Arguments

None

public interface stdlib_sgebrd()

Arguments

None

public interface stdlib_zgebrd()

Arguments

None