version 1.14, 2012/12/14 14:22:55
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version 1.19, 2018/05/29 06:55:26
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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 ZTGEX2 + dependencies |
*> Download ZTGEX2 + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/ztgex2.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/ztgex2.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/ztgex2.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/ztgex2.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/ztgex2.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/ztgex2.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE ZTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z, |
* SUBROUTINE ZTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z, |
* LDZ, J1, INFO ) |
* LDZ, J1, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* LOGICAL WANTQ, WANTZ |
* LOGICAL WANTQ, WANTZ |
* INTEGER INFO, J1, LDA, LDB, LDQ, LDZ, N |
* INTEGER INFO, J1, LDA, LDB, LDQ, LDZ, N |
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* COMPLEX*16 A( LDA, * ), B( LDB, * ), Q( LDQ, * ), |
* COMPLEX*16 A( LDA, * ), B( LDB, * ), Q( LDQ, * ), |
* $ Z( LDZ, * ) |
* $ Z( LDZ, * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> |
*> |
*> \param[in,out] A |
*> \param[in,out] A |
*> \verbatim |
*> \verbatim |
*> A is COMPLEX*16 arrays, dimensions (LDA,N) |
*> A is COMPLEX*16 array, dimensions (LDA,N) |
*> On entry, the matrix A in the pair (A, B). |
*> On entry, the matrix A in the pair (A, B). |
*> On exit, the updated matrix A. |
*> On exit, the updated matrix A. |
*> \endverbatim |
*> \endverbatim |
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*> |
*> |
*> \param[in,out] B |
*> \param[in,out] B |
*> \verbatim |
*> \verbatim |
*> B is COMPLEX*16 arrays, dimensions (LDB,N) |
*> B is COMPLEX*16 array, dimensions (LDB,N) |
*> On entry, the matrix B in the pair (A, B). |
*> On entry, the matrix B in the pair (A, B). |
*> On exit, the updated matrix B. |
*> On exit, the updated matrix B. |
*> \endverbatim |
*> \endverbatim |
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*> |
*> |
*> \param[in,out] Q |
*> \param[in,out] Q |
*> \verbatim |
*> \verbatim |
*> Q is COMPLEX*16 array, dimension (LDZ,N) |
*> Q is COMPLEX*16 array, dimension (LDQ,N) |
*> If WANTQ = .TRUE, on entry, the unitary matrix Q. On exit, |
*> If WANTQ = .TRUE, on entry, the unitary matrix Q. On exit, |
*> the updated matrix Q. |
*> the updated matrix Q. |
*> Not referenced if WANTQ = .FALSE.. |
*> Not referenced if WANTQ = .FALSE.. |
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*> =0: Successful exit. |
*> =0: Successful exit. |
*> =1: The transformed matrix pair (A, B) would be too far |
*> =1: The transformed matrix pair (A, B) would be too far |
*> from generalized Schur form; the problem is ill- |
*> from generalized Schur form; the problem is ill- |
*> conditioned. |
*> conditioned. |
*> \endverbatim |
*> \endverbatim |
* |
* |
* 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 September 2012 |
*> \date June 2017 |
* |
* |
*> \ingroup complex16GEauxiliary |
*> \ingroup complex16GEauxiliary |
* |
* |
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SUBROUTINE ZTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z, |
SUBROUTINE ZTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z, |
$ LDZ, J1, INFO ) |
$ LDZ, J1, INFO ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.2) -- |
* -- LAPACK auxiliary routine (version 3.7.1) -- |
* -- 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..-- |
* September 2012 |
* June 2017 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
LOGICAL WANTQ, WANTZ |
LOGICAL WANTQ, WANTZ |
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CALL ZLASSQ( 2*M*M, WORK, 1, SCALE, SUM ) |
CALL ZLASSQ( 2*M*M, WORK, 1, SCALE, SUM ) |
SA = SCALE*SQRT( SUM ) |
SA = SCALE*SQRT( SUM ) |
* |
* |
* THRES has been changed from |
* THRES has been changed from |
* THRESH = MAX( TEN*EPS*SA, SMLNUM ) |
* THRESH = MAX( TEN*EPS*SA, SMLNUM ) |
* to |
* to |
* THRESH = MAX( TWENTY*EPS*SA, SMLNUM ) |
* THRESH = MAX( TWENTY*EPS*SA, SMLNUM ) |