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version 1.17, 2017/06/17 10:54:18
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*> \brief \b ZLAED7 |
*> \brief \b ZLAED7 used by sstedc. Computes the updated eigensystem of a diagonal matrix after modification by a rank-one symmetric matrix. Used when the original matrix is dense. |
* |
* |
* =========== 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 ZLAED7 + dependencies |
*> Download ZLAED7 + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlaed7.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlaed7.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlaed7.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlaed7.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlaed7.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlaed7.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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* LDQ, RHO, INDXQ, QSTORE, QPTR, PRMPTR, PERM, |
* LDQ, RHO, INDXQ, QSTORE, QPTR, PRMPTR, PERM, |
* GIVPTR, GIVCOL, GIVNUM, WORK, RWORK, IWORK, |
* GIVPTR, GIVCOL, GIVNUM, WORK, RWORK, IWORK, |
* INFO ) |
* INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER CURLVL, CURPBM, CUTPNT, INFO, LDQ, N, QSIZ, |
* INTEGER CURLVL, CURPBM, CUTPNT, INFO, LDQ, N, QSIZ, |
* $ TLVLS |
* $ TLVLS |
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* DOUBLE PRECISION D( * ), GIVNUM( 2, * ), QSTORE( * ), RWORK( * ) |
* DOUBLE PRECISION D( * ), GIVNUM( 2, * ), QSTORE( * ), RWORK( * ) |
* COMPLEX*16 Q( LDQ, * ), WORK( * ) |
* COMPLEX*16 Q( LDQ, * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> |
*> |
*> The first stage consists of deflating the size of the problem |
*> The first stage consists of deflating the size of the problem |
*> when there are multiple eigenvalues or if there is a zero in |
*> when there are multiple eigenvalues or if there is a zero in |
*> the Z vector. For each such occurence the dimension of the |
*> the Z vector. For each such occurrence the dimension of the |
*> secular equation problem is reduced by one. This stage is |
*> secular equation problem is reduced by one. This stage is |
*> performed by the routine DLAED2. |
*> performed by the routine DLAED2. |
*> |
*> |
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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 June 2016 |
* |
* |
*> \ingroup complex16OTHERcomputational |
*> \ingroup complex16OTHERcomputational |
* |
* |
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$ GIVPTR, GIVCOL, GIVNUM, WORK, RWORK, IWORK, |
$ GIVPTR, GIVCOL, GIVNUM, WORK, RWORK, IWORK, |
$ INFO ) |
$ INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational 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 |
* June 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER CURLVL, CURPBM, CUTPNT, INFO, LDQ, N, QSIZ, |
INTEGER CURLVL, CURPBM, CUTPNT, INFO, LDQ, N, QSIZ, |