version 1.12, 2012/08/22 09:48:20
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version 1.19, 2017/06/17 11:06:26
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*> \brief \b DLASD0 |
*> \brief \b DLASD0 computes the singular values of a real upper bidiagonal n-by-m matrix B with diagonal d and off-diagonal e. Used by sbdsdc. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
* Online html documentation available at |
* Online html documentation available at |
* http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
* |
* |
*> \htmlonly |
*> \htmlonly |
*> Download DLASD0 + dependencies |
*> Download DLASD0 + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlasd0.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlasd0.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlasd0.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlasd0.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlasd0.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlasd0.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DLASD0( N, SQRE, D, E, U, LDU, VT, LDVT, SMLSIZ, IWORK, |
* SUBROUTINE DLASD0( N, SQRE, D, E, U, LDU, VT, LDVT, SMLSIZ, IWORK, |
* WORK, INFO ) |
* WORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER INFO, LDU, LDVT, N, SMLSIZ, SQRE |
* INTEGER INFO, LDU, LDVT, N, SMLSIZ, SQRE |
* .. |
* .. |
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* DOUBLE PRECISION D( * ), E( * ), U( LDU, * ), VT( LDVT, * ), |
* DOUBLE PRECISION D( * ), E( * ), U( LDU, * ), VT( LDVT, * ), |
* $ WORK( * ) |
* $ WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> On exit D, if INFO = 0, contains its singular values. |
*> On exit D, if INFO = 0, contains its singular values. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] E |
*> \param[in,out] E |
*> \verbatim |
*> \verbatim |
*> E is DOUBLE PRECISION array, dimension (M-1) |
*> E is DOUBLE PRECISION array, dimension (M-1) |
*> Contains the subdiagonal entries of the bidiagonal matrix. |
*> Contains the subdiagonal entries of the bidiagonal matrix. |
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* Authors: |
* Authors: |
* ======== |
* ======== |
* |
* |
*> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
*> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date December 2016 |
* |
* |
*> \ingroup auxOTHERauxiliary |
*> \ingroup OTHERauxiliary |
* |
* |
*> \par Contributors: |
*> \par Contributors: |
* ================== |
* ================== |
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SUBROUTINE DLASD0( N, SQRE, D, E, U, LDU, VT, LDVT, SMLSIZ, IWORK, |
SUBROUTINE DLASD0( N, SQRE, D, E, U, LDU, VT, LDVT, SMLSIZ, IWORK, |
$ WORK, INFO ) |
$ WORK, INFO ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.7.0) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2011 |
* December 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, LDU, LDVT, N, SMLSIZ, SQRE |
INTEGER INFO, LDU, LDVT, N, SMLSIZ, SQRE |
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CALL DLASD1( NL, NR, SQREI, D( NLF ), ALPHA, BETA, |
CALL DLASD1( NL, NR, SQREI, D( NLF ), ALPHA, BETA, |
$ U( NLF, NLF ), LDU, VT( NLF, NLF ), LDVT, |
$ U( NLF, NLF ), LDU, VT( NLF, NLF ), LDVT, |
$ IWORK( IDXQC ), IWORK( IWK ), WORK, INFO ) |
$ IWORK( IDXQC ), IWORK( IWK ), WORK, INFO ) |
|
* |
|
* Report the possible convergence failure. |
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* |
IF( INFO.NE.0 ) THEN |
IF( INFO.NE.0 ) THEN |
RETURN |
RETURN |
END IF |
END IF |