Man page - gsvj1(3)

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Manual

gsvj1

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
subroutine cgsvj1 (character*1 jobv, integer m, integer n, integer n1,complex, dimension( lda, * ) a, integer lda, complex, dimension( n ) d,real, dimension( n ) sva, integer mv, complex, dimension( ldv, * ) v,integer ldv, real eps, real sfmin, real tol, integer nsweep, complex,dimension( lwork ) work, integer lwork, integer info)
subroutine dgsvj1 (character*1 jobv, integer m, integer n, integer n1,double precision, dimension( lda, * ) a, integer lda, double precision,dimension( n ) d, double precision, dimension( n ) sva, integer mv,double precision, dimension( ldv, * ) v, integer ldv, double precisioneps, double precision sfmin, double precision tol, integer nsweep,double precision, dimension( lwork ) work, integer lwork, integer info)
subroutine sgsvj1 (character*1 jobv, integer m, integer n, integer n1,real, dimension( lda, * ) a, integer lda, real, dimension( n ) d, real,dimension( n ) sva, integer mv, real, dimension( ldv, * ) v, integerldv, real eps, real sfmin, real tol, integer nsweep, real, dimension(lwork ) work, integer lwork, integer info)
subroutine zgsvj1 (character*1 jobv, integer m, integer n, integer n1,complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension(n ) d, double precision, dimension( n ) sva, integer mv, complex*16,dimension( ldv, * ) v, integer ldv, double precision eps, doubleprecision sfmin, double precision tol, integer nsweep, complex*16,dimension( lwork ) work, integer lwork, integer info)
Author

NAME

gsvj1 - gsvj1: step in gesvj

SYNOPSIS

Functions

subroutine cgsvj1 (jobv, m, n, n1, a, lda, d, sva, mv, v, ldv, eps, sfmin, tol, nsweep, work, lwork, info)
CGSVJ1 pre-processor for the routine cgesvj, applies Jacobi rotations targeting only particular pivots.
subroutine dgsvj1 (jobv, m, n, n1, a, lda, d, sva, mv, v, ldv, eps, sfmin, tol, nsweep, work, lwork, info)
DGSVJ1 pre-processor for the routine dgesvj, applies Jacobi rotations targeting only particular pivots.
subroutine sgsvj1 (jobv, m, n, n1, a, lda, d, sva, mv, v, ldv, eps, sfmin, tol, nsweep, work, lwork, info)
SGSVJ1 pre-processor for the routine sgesvj, applies Jacobi rotations targeting only particular pivots.
subroutine zgsvj1 (jobv, m, n, n1, a, lda, d, sva, mv, v, ldv, eps, sfmin, tol, nsweep, work, lwork, info)
ZGSVJ1 pre-processor for the routine zgesvj, applies Jacobi rotations targeting only particular pivots.

Detailed Description

Function Documentation

subroutine cgsvj1 (character*1 jobv, integer m, integer n, integer n1,complex, dimension( lda, * ) a, integer lda, complex, dimension( n ) d,real, dimension( n ) sva, integer mv, complex, dimension( ldv, * ) v,integer ldv, real eps, real sfmin, real tol, integer nsweep, complex,dimension( lwork ) work, integer lwork, integer info)

CGSVJ1 pre-processor for the routine cgesvj, applies Jacobi rotations targeting only particular pivots.

Purpose:

CGSVJ1 is called from CGESVJ as a pre-processor and that is its main
purpose. It applies Jacobi rotations in the same way as CGESVJ does, but
it targets only particular pivots and it does not check convergence
(stopping criterion). Few tuning parameters (marked by [TP]) are
available for the implementer.

Further Details
˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜
CGSVJ1 applies few sweeps of Jacobi rotations in the column space of
the input M-by-N matrix A. The pivot pairs are taken from the (1,2)
off-diagonal block in the corresponding N-by-N Gram matrix AˆT * A. The
block-entries (tiles) of the (1,2) off-diagonal block are marked by the
[x]’s in the following scheme:

| * * * [x] [x] [x]|
| * * * [x] [x] [x]| Row-cycling in the nblr-by-nblc [x] blocks.
| * * * [x] [x] [x]| Row-cyclic pivoting inside each [x] block.
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |

In terms of the columns of A, the first N1 columns are rotated ’against’
the remaining N-N1 columns, trying to increase the angle between the
corresponding subspaces. The off-diagonal block is N1-by(N-N1) and it is
tiled using quadratic tiles of side KBL. Here, KBL is a tuning parameter.
The number of sweeps is given in NSWEEP and the orthogonality threshold
is given in TOL.

Parameters

JOBV

JOBV is CHARACTER*1
Specifies whether the output from this procedure is used
to compute the matrix V:
= ’V’: the product of the Jacobi rotations is accumulated
by postmultiplying the N-by-N array V.
(See the description of V.)
= ’A’: the product of the Jacobi rotations is accumulated
by postmultiplying the MV-by-N array V.
(See the descriptions of MV and V.)
= ’N’: the Jacobi rotations are not accumulated.

M

M is INTEGER
The number of rows of the input matrix A. M >= 0.

N

N is INTEGER
The number of columns of the input matrix A.
M >= N >= 0.

N1

N1 is INTEGER
N1 specifies the 2 x 2 block partition, the first N1 columns are
rotated ’against’ the remaining N-N1 columns of A.

A

A is COMPLEX array, dimension (LDA,N)
On entry, M-by-N matrix A, such that A*diag(D) represents
the input matrix.
On exit,
A_onexit * D_onexit represents the input matrix A*diag(D)
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, D, TOL and NSWEEP.)

LDA

LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,M).

D

D is COMPLEX array, dimension (N)
The array D accumulates the scaling factors from the fast scaled
Jacobi rotations.
On entry, A*diag(D) represents the input matrix.
On exit, A_onexit*diag(D_onexit) represents the input matrix
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, A, TOL and NSWEEP.)

SVA

SVA is REAL array, dimension (N)
On entry, SVA contains the Euclidean norms of the columns of
the matrix A*diag(D).
On exit, SVA contains the Euclidean norms of the columns of
the matrix onexit*diag(D_onexit).

MV

MV is INTEGER
If JOBV = ’A’, then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then MV is not referenced.

V

V is COMPLEX array, dimension (LDV,N)
If JOBV = ’V’ then N rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’A’ then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then V is not referenced.

LDV

LDV is INTEGER
The leading dimension of the array V, LDV >= 1.
If JOBV = ’V’, LDV >= N.
If JOBV = ’A’, LDV >= MV.

EPS

EPS is REAL
EPS = SLAMCH(’Epsilon’)

SFMIN

SFMIN is REAL
SFMIN = SLAMCH(’Safe Minimum’)

TOL

TOL is REAL
TOL is the threshold for Jacobi rotations. For a pair
A(:,p), A(:,q) of pivot columns, the Jacobi rotation is
applied only if ABS(COS(angle(A(:,p),A(:,q)))) > TOL.

NSWEEP

NSWEEP is INTEGER
NSWEEP is the number of sweeps of Jacobi rotations to be
performed.

WORK

WORK is COMPLEX array, dimension (LWORK)

LWORK

LWORK is INTEGER
LWORK is the dimension of WORK. LWORK >= M.

INFO

INFO is INTEGER
= 0: successful exit.
< 0: if INFO = -i, then the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributor:

Zlatko Drmac (Zagreb, Croatia)

subroutine dgsvj1 (character*1 jobv, integer m, integer n, integer n1,double precision, dimension( lda, * ) a, integer lda, double precision,dimension( n ) d, double precision, dimension( n ) sva, integer mv,double precision, dimension( ldv, * ) v, integer ldv, double precisioneps, double precision sfmin, double precision tol, integer nsweep,double precision, dimension( lwork ) work, integer lwork, integer info)

DGSVJ1 pre-processor for the routine dgesvj, applies Jacobi rotations targeting only particular pivots.

Purpose:

DGSVJ1 is called from DGESVJ as a pre-processor and that is its main
purpose. It applies Jacobi rotations in the same way as DGESVJ does, but
it targets only particular pivots and it does not check convergence
(stopping criterion). Few tuning parameters (marked by [TP]) are
available for the implementer.

Further Details
˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜
DGSVJ1 applies few sweeps of Jacobi rotations in the column space of
the input M-by-N matrix A. The pivot pairs are taken from the (1,2)
off-diagonal block in the corresponding N-by-N Gram matrix AˆT * A. The
block-entries (tiles) of the (1,2) off-diagonal block are marked by the
[x]’s in the following scheme:

| * * * [x] [x] [x]|
| * * * [x] [x] [x]| Row-cycling in the nblr-by-nblc [x] blocks.
| * * * [x] [x] [x]| Row-cyclic pivoting inside each [x] block.
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |

In terms of the columns of A, the first N1 columns are rotated ’against’
the remaining N-N1 columns, trying to increase the angle between the
corresponding subspaces. The off-diagonal block is N1-by(N-N1) and it is
tiled using quadratic tiles of side KBL. Here, KBL is a tuning parameter.
The number of sweeps is given in NSWEEP and the orthogonality threshold
is given in TOL.

Parameters

JOBV

JOBV is CHARACTER*1
Specifies whether the output from this procedure is used
to compute the matrix V:
= ’V’: the product of the Jacobi rotations is accumulated
by postmultiplying the N-by-N array V.
(See the description of V.)
= ’A’: the product of the Jacobi rotations is accumulated
by postmultiplying the MV-by-N array V.
(See the descriptions of MV and V.)
= ’N’: the Jacobi rotations are not accumulated.

M

M is INTEGER
The number of rows of the input matrix A. M >= 0.

N

N is INTEGER
The number of columns of the input matrix A.
M >= N >= 0.

N1

N1 is INTEGER
N1 specifies the 2 x 2 block partition, the first N1 columns are
rotated ’against’ the remaining N-N1 columns of A.

A

A is DOUBLE PRECISION array, dimension (LDA,N)
On entry, M-by-N matrix A, such that A*diag(D) represents
the input matrix.
On exit,
A_onexit * D_onexit represents the input matrix A*diag(D)
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, D, TOL and NSWEEP.)

LDA

LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,M).

D

D is DOUBLE PRECISION array, dimension (N)
The array D accumulates the scaling factors from the fast scaled
Jacobi rotations.
On entry, A*diag(D) represents the input matrix.
On exit, A_onexit*diag(D_onexit) represents the input matrix
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, A, TOL and NSWEEP.)

SVA

SVA is DOUBLE PRECISION array, dimension (N)
On entry, SVA contains the Euclidean norms of the columns of
the matrix A*diag(D).
On exit, SVA contains the Euclidean norms of the columns of
the matrix onexit*diag(D_onexit).

MV

MV is INTEGER
If JOBV = ’A’, then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then MV is not referenced.

V

V is DOUBLE PRECISION array, dimension (LDV,N)
If JOBV = ’V’, then N rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’A’, then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then V is not referenced.

LDV

LDV is INTEGER
The leading dimension of the array V, LDV >= 1.
If JOBV = ’V’, LDV >= N.
If JOBV = ’A’, LDV >= MV.

EPS

EPS is DOUBLE PRECISION
EPS = DLAMCH(’Epsilon’)

SFMIN

SFMIN is DOUBLE PRECISION
SFMIN = DLAMCH(’Safe Minimum’)

TOL

TOL is DOUBLE PRECISION
TOL is the threshold for Jacobi rotations. For a pair
A(:,p), A(:,q) of pivot columns, the Jacobi rotation is
applied only if DABS(COS(angle(A(:,p),A(:,q)))) > TOL.

NSWEEP

NSWEEP is INTEGER
NSWEEP is the number of sweeps of Jacobi rotations to be
performed.

WORK

WORK is DOUBLE PRECISION array, dimension (LWORK)

LWORK

LWORK is INTEGER
LWORK is the dimension of WORK. LWORK >= M.

INFO

INFO is INTEGER
= 0: successful exit.
< 0: if INFO = -i, then the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributors:

Zlatko Drmac (Zagreb, Croatia) and Kresimir Veselic (Hagen, Germany)

subroutine sgsvj1 (character*1 jobv, integer m, integer n, integer n1,real, dimension( lda, * ) a, integer lda, real, dimension( n ) d, real,dimension( n ) sva, integer mv, real, dimension( ldv, * ) v, integerldv, real eps, real sfmin, real tol, integer nsweep, real, dimension(lwork ) work, integer lwork, integer info)

SGSVJ1 pre-processor for the routine sgesvj, applies Jacobi rotations targeting only particular pivots.

Purpose:

SGSVJ1 is called from SGESVJ as a pre-processor and that is its main
purpose. It applies Jacobi rotations in the same way as SGESVJ does, but
it targets only particular pivots and it does not check convergence
(stopping criterion). Few tuning parameters (marked by [TP]) are
available for the implementer.

Further Details
˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜
SGSVJ1 applies few sweeps of Jacobi rotations in the column space of
the input M-by-N matrix A. The pivot pairs are taken from the (1,2)
off-diagonal block in the corresponding N-by-N Gram matrix AˆT * A. The
block-entries (tiles) of the (1,2) off-diagonal block are marked by the
[x]’s in the following scheme:

| * * * [x] [x] [x]|
| * * * [x] [x] [x]| Row-cycling in the nblr-by-nblc [x] blocks.
| * * * [x] [x] [x]| Row-cyclic pivoting inside each [x] block.
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |

In terms of the columns of A, the first N1 columns are rotated ’against’
the remaining N-N1 columns, trying to increase the angle between the
corresponding subspaces. The off-diagonal block is N1-by(N-N1) and it is
tiled using quadratic tiles of side KBL. Here, KBL is a tuning parameter.
The number of sweeps is given in NSWEEP and the orthogonality threshold
is given in TOL.

Parameters

JOBV

JOBV is CHARACTER*1
Specifies whether the output from this procedure is used
to compute the matrix V:
= ’V’: the product of the Jacobi rotations is accumulated
by postmultiplying the N-by-N array V.
(See the description of V.)
= ’A’: the product of the Jacobi rotations is accumulated
by postmultiplying the MV-by-N array V.
(See the descriptions of MV and V.)
= ’N’: the Jacobi rotations are not accumulated.

M

M is INTEGER
The number of rows of the input matrix A. M >= 0.

N

N is INTEGER
The number of columns of the input matrix A.
M >= N >= 0.

N1

N1 is INTEGER
N1 specifies the 2 x 2 block partition, the first N1 columns are
rotated ’against’ the remaining N-N1 columns of A.

A

A is REAL array, dimension (LDA,N)
On entry, M-by-N matrix A, such that A*diag(D) represents
the input matrix.
On exit,
A_onexit * D_onexit represents the input matrix A*diag(D)
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, D, TOL and NSWEEP.)

LDA

LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,M).

D

D is REAL array, dimension (N)
The array D accumulates the scaling factors from the fast scaled
Jacobi rotations.
On entry, A*diag(D) represents the input matrix.
On exit, A_onexit*diag(D_onexit) represents the input matrix
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, A, TOL and NSWEEP.)

SVA

SVA is REAL array, dimension (N)
On entry, SVA contains the Euclidean norms of the columns of
the matrix A*diag(D).
On exit, SVA contains the Euclidean norms of the columns of
the matrix onexit*diag(D_onexit).

MV

MV is INTEGER
If JOBV = ’A’, then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then MV is not referenced.

V

V is REAL array, dimension (LDV,N)
If JOBV = ’V’ then N rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’A’ then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then V is not referenced.

LDV

LDV is INTEGER
The leading dimension of the array V, LDV >= 1.
If JOBV = ’V’, LDV >= N.
If JOBV = ’A’, LDV >= MV.

EPS

EPS is REAL
EPS = SLAMCH(’Epsilon’)

SFMIN

SFMIN is REAL
SFMIN = SLAMCH(’Safe Minimum’)

TOL

TOL is REAL
TOL is the threshold for Jacobi rotations. For a pair
A(:,p), A(:,q) of pivot columns, the Jacobi rotation is
applied only if ABS(COS(angle(A(:,p),A(:,q)))) > TOL.

NSWEEP

NSWEEP is INTEGER
NSWEEP is the number of sweeps of Jacobi rotations to be
performed.

WORK

WORK is REAL array, dimension (LWORK)

LWORK

LWORK is INTEGER
LWORK is the dimension of WORK. LWORK >= M.

INFO

INFO is INTEGER
= 0: successful exit.
< 0: if INFO = -i, then the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributors:

Zlatko Drmac (Zagreb, Croatia) and Kresimir Veselic (Hagen, Germany)

subroutine zgsvj1 (character*1 jobv, integer m, integer n, integer n1,complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension(n ) d, double precision, dimension( n ) sva, integer mv, complex*16,dimension( ldv, * ) v, integer ldv, double precision eps, doubleprecision sfmin, double precision tol, integer nsweep, complex*16,dimension( lwork ) work, integer lwork, integer info)

ZGSVJ1 pre-processor for the routine zgesvj, applies Jacobi rotations targeting only particular pivots.

Purpose:

ZGSVJ1 is called from ZGESVJ as a pre-processor and that is its main
purpose. It applies Jacobi rotations in the same way as ZGESVJ does, but
it targets only particular pivots and it does not check convergence
(stopping criterion). Few tuning parameters (marked by [TP]) are
available for the implementer.

Further Details
˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜
ZGSVJ1 applies few sweeps of Jacobi rotations in the column space of
the input M-by-N matrix A. The pivot pairs are taken from the (1,2)
off-diagonal block in the corresponding N-by-N Gram matrix AˆT * A. The
block-entries (tiles) of the (1,2) off-diagonal block are marked by the
[x]’s in the following scheme:

| * * * [x] [x] [x]|
| * * * [x] [x] [x]| Row-cycling in the nblr-by-nblc [x] blocks.
| * * * [x] [x] [x]| Row-cyclic pivoting inside each [x] block.
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |
|[x] [x] [x] * * * |

In terms of the columns of A, the first N1 columns are rotated ’against’
the remaining N-N1 columns, trying to increase the angle between the
corresponding subspaces. The off-diagonal block is N1-by(N-N1) and it is
tiled using quadratic tiles of side KBL. Here, KBL is a tuning parameter.
The number of sweeps is given in NSWEEP and the orthogonality threshold
is given in TOL.

Parameters

JOBV

JOBV is CHARACTER*1
Specifies whether the output from this procedure is used
to compute the matrix V:
= ’V’: the product of the Jacobi rotations is accumulated
by postmultiplying the N-by-N array V.
(See the description of V.)
= ’A’: the product of the Jacobi rotations is accumulated
by postmultiplying the MV-by-N array V.
(See the descriptions of MV and V.)
= ’N’: the Jacobi rotations are not accumulated.

M

M is INTEGER
The number of rows of the input matrix A. M >= 0.

N

N is INTEGER
The number of columns of the input matrix A.
M >= N >= 0.

N1

N1 is INTEGER
N1 specifies the 2 x 2 block partition, the first N1 columns are
rotated ’against’ the remaining N-N1 columns of A.

A

A is COMPLEX*16 array, dimension (LDA,N)
On entry, M-by-N matrix A, such that A*diag(D) represents
the input matrix.
On exit,
A_onexit * D_onexit represents the input matrix A*diag(D)
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, D, TOL and NSWEEP.)

LDA

LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,M).

D

D is COMPLEX*16 array, dimension (N)
The array D accumulates the scaling factors from the fast scaled
Jacobi rotations.
On entry, A*diag(D) represents the input matrix.
On exit, A_onexit*diag(D_onexit) represents the input matrix
post-multiplied by a sequence of Jacobi rotations, where the
rotation threshold and the total number of sweeps are given in
TOL and NSWEEP, respectively.
(See the descriptions of N1, A, TOL and NSWEEP.)

SVA

SVA is DOUBLE PRECISION array, dimension (N)
On entry, SVA contains the Euclidean norms of the columns of
the matrix A*diag(D).
On exit, SVA contains the Euclidean norms of the columns of
the matrix onexit*diag(D_onexit).

MV

MV is INTEGER
If JOBV = ’A’, then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then MV is not referenced.

V

V is COMPLEX*16 array, dimension (LDV,N)
If JOBV = ’V’ then N rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’A’ then MV rows of V are post-multiplied by a
sequence of Jacobi rotations.
If JOBV = ’N’, then V is not referenced.

LDV

LDV is INTEGER
The leading dimension of the array V, LDV >= 1.
If JOBV = ’V’, LDV >= N.
If JOBV = ’A’, LDV >= MV.

EPS

EPS is DOUBLE PRECISION
EPS = DLAMCH(’Epsilon’)

SFMIN

SFMIN is DOUBLE PRECISION
SFMIN = DLAMCH(’Safe Minimum’)

TOL

TOL is DOUBLE PRECISION
TOL is the threshold for Jacobi rotations. For a pair
A(:,p), A(:,q) of pivot columns, the Jacobi rotation is
applied only if ABS(COS(angle(A(:,p),A(:,q)))) > TOL.

NSWEEP

NSWEEP is INTEGER
NSWEEP is the number of sweeps of Jacobi rotations to be
performed.

WORK

WORK is COMPLEX*16 array, dimension (LWORK)

LWORK

LWORK is INTEGER
LWORK is the dimension of WORK. LWORK >= M.

INFO

INFO is INTEGER
= 0: successful exit.
< 0: if INFO = -i, then the i-th argument had an illegal value

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Contributor:

Zlatko Drmac (Zagreb, Croatia)

Author

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