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version 1.19, 2023/08/07 08:39:13
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* |
* |
* =========== 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 DTRSEN + dependencies |
*> Download DTRSEN + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dtrsen.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dtrsen.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dtrsen.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dtrsen.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dtrsen.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dtrsen.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DTRSEN( JOB, COMPQ, SELECT, N, T, LDT, Q, LDQ, WR, WI, |
* SUBROUTINE DTRSEN( JOB, COMPQ, SELECT, N, T, LDT, Q, LDQ, WR, WI, |
* M, S, SEP, WORK, LWORK, IWORK, LIWORK, INFO ) |
* M, S, SEP, WORK, LWORK, IWORK, LIWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER COMPQ, JOB |
* CHARACTER COMPQ, JOB |
* INTEGER INFO, LDQ, LDT, LIWORK, LWORK, M, N |
* INTEGER INFO, LDQ, LDT, LIWORK, LWORK, M, N |
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* DOUBLE PRECISION Q( LDQ, * ), T( LDT, * ), WI( * ), WORK( * ), |
* DOUBLE PRECISION Q( LDQ, * ), T( LDT, * ), WI( * ), WORK( * ), |
* $ WR( * ) |
* $ WR( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> |
*> |
*> T must be in Schur canonical form (as returned by DHSEQR), that is, |
*> T must be in Schur canonical form (as returned by DHSEQR), that is, |
*> block upper triangular with 1-by-1 and 2-by-2 diagonal blocks; each |
*> block upper triangular with 1-by-1 and 2-by-2 diagonal blocks; each |
*> 2-by-2 diagonal block has its diagonal elemnts equal and its |
*> 2-by-2 diagonal block has its diagonal elements equal and its |
*> off-diagonal elements of opposite sign. |
*> off-diagonal elements of opposite sign. |
*> \endverbatim |
*> \endverbatim |
* |
* |
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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. |
* |
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*> \date November 2011 |
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* |
* |
*> \ingroup doubleOTHERcomputational |
*> \ingroup doubleOTHERcomputational |
* |
* |
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SUBROUTINE DTRSEN( JOB, COMPQ, SELECT, N, T, LDT, Q, LDQ, WR, WI, |
SUBROUTINE DTRSEN( JOB, COMPQ, SELECT, N, T, LDT, Q, LDQ, WR, WI, |
$ M, S, SEP, WORK, LWORK, IWORK, LIWORK, INFO ) |
$ M, S, SEP, WORK, LWORK, IWORK, LIWORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational routine -- |
* -- 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 |
|
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER COMPQ, JOB |
CHARACTER COMPQ, JOB |