version 1.2, 2016/08/27 15:27:12
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version 1.7, 2023/08/07 08:39:21
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date January 2015 |
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* |
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*> \ingroup complex16OTHERcomputational |
*> \ingroup complex16OTHERcomputational |
* |
* |
*> \par Further Details: |
*> \par Further Details: |
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*> |
*> |
*> \verbatim |
*> \verbatim |
*> |
*> |
*> This routine reduces A to Hessenberg form and maintains B in |
*> This routine reduces A to Hessenberg form and maintains B in triangular form |
*> using a blocked variant of Moler and Stewart's original algorithm, |
*> using a blocked variant of Moler and Stewart's original algorithm, |
*> as described by Kagstrom, Kressner, Quintana-Orti, and Quintana-Orti |
*> as described by Kagstrom, Kressner, Quintana-Orti, and Quintana-Orti |
*> (BIT 2008). |
*> (BIT 2008). |
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SUBROUTINE ZGGHD3( COMPQ, COMPZ, N, ILO, IHI, A, LDA, B, LDB, Q, |
SUBROUTINE ZGGHD3( COMPQ, COMPZ, N, ILO, IHI, A, LDA, B, LDB, Q, |
$ LDQ, Z, LDZ, WORK, LWORK, INFO ) |
$ LDQ, Z, LDZ, WORK, LWORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.6.1) -- |
* -- 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..-- |
* January 2015 |
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* |
* |
IMPLICIT NONE |
IMPLICIT NONE |
* |
* |
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EXTERNAL ILAENV, LSAME |
EXTERNAL ILAENV, LSAME |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL ZGGHRD, ZLARTG, ZLASET, ZUNM22, ZROT, XERBLA |
EXTERNAL ZGGHRD, ZLARTG, ZLASET, ZUNM22, ZROT, ZGEMM, |
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$ ZGEMV, ZTRMV, ZLACPY, XERBLA |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC DBLE, DCMPLX, DCONJG, MAX |
INTRINSIC DBLE, DCMPLX, DCONJG, MAX |