version 1.10, 2011/11/21 22:19:27
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version 1.20, 2023/08/07 08:38:48
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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 DGEESX + dependencies |
*> Download DGEESX + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgeesx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgeesx.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgeesx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgeesx.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgeesx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgeesx.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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* SUBROUTINE DGEESX( JOBVS, SORT, SELECT, SENSE, N, A, LDA, SDIM, |
* SUBROUTINE DGEESX( JOBVS, SORT, SELECT, SENSE, N, A, LDA, SDIM, |
* WR, WI, VS, LDVS, RCONDE, RCONDV, WORK, LWORK, |
* WR, WI, VS, LDVS, RCONDE, RCONDV, WORK, LWORK, |
* IWORK, LIWORK, BWORK, INFO ) |
* IWORK, LIWORK, BWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER JOBVS, SENSE, SORT |
* CHARACTER JOBVS, SENSE, SORT |
* INTEGER INFO, LDA, LDVS, LIWORK, LWORK, N, SDIM |
* INTEGER INFO, LDA, LDVS, LIWORK, LWORK, N, SDIM |
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* LOGICAL SELECT |
* LOGICAL SELECT |
* EXTERNAL SELECT |
* EXTERNAL SELECT |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> |
*> |
*> \param[in] SELECT |
*> \param[in] SELECT |
*> \verbatim |
*> \verbatim |
*> SELECT is procedure) LOGICAL FUNCTION of two DOUBLE PRECISION arguments |
*> SELECT is a LOGICAL FUNCTION of two DOUBLE PRECISION arguments |
*> SELECT must be declared EXTERNAL in the calling subroutine. |
*> SELECT must be declared EXTERNAL in the calling subroutine. |
*> If SORT = 'S', SELECT is used to select eigenvalues to sort |
*> If SORT = 'S', SELECT is used to select eigenvalues to sort |
*> to the top left of the Schur form. |
*> to the top left of the Schur form. |
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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 doubleGEeigen |
*> \ingroup doubleGEeigen |
* |
* |
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$ WR, WI, VS, LDVS, RCONDE, RCONDV, WORK, LWORK, |
$ WR, WI, VS, LDVS, RCONDE, RCONDV, WORK, LWORK, |
$ IWORK, LIWORK, BWORK, INFO ) |
$ IWORK, LIWORK, BWORK, INFO ) |
* |
* |
* -- LAPACK driver routine (version 3.4.0) -- |
* -- LAPACK driver 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 JOBVS, SENSE, SORT |
CHARACTER JOBVS, SENSE, SORT |
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* |
* |
CALL DHSEQR( 'S', JOBVS, N, 1, N, A, LDA, WR, WI, VS, LDVS, |
CALL DHSEQR( 'S', JOBVS, N, 1, N, A, LDA, WR, WI, VS, LDVS, |
$ WORK, -1, IEVAL ) |
$ WORK, -1, IEVAL ) |
HSWORK = WORK( 1 ) |
HSWORK = INT( WORK( 1 ) ) |
* |
* |
IF( .NOT.WANTVS ) THEN |
IF( .NOT.WANTVS ) THEN |
MAXWRK = MAX( MAXWRK, N + HSWORK ) |
MAXWRK = MAX( MAXWRK, N + HSWORK ) |
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IF( N.GT.I+1 ) |
IF( N.GT.I+1 ) |
$ CALL DSWAP( N-I-1, A( I, I+2 ), LDA, |
$ CALL DSWAP( N-I-1, A( I, I+2 ), LDA, |
$ A( I+1, I+2 ), LDA ) |
$ A( I+1, I+2 ), LDA ) |
CALL DSWAP( N, VS( 1, I ), 1, VS( 1, I+1 ), 1 ) |
IF( WANTVS ) THEN |
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CALL DSWAP( N, VS( 1, I ), 1, VS( 1, I+1 ), 1 ) |
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END IF |
A( I, I+1 ) = A( I+1, I ) |
A( I, I+1 ) = A( I+1, I ) |
A( I+1, I ) = ZERO |
A( I+1, I ) = ZERO |
END IF |
END IF |