version 1.10, 2012/08/22 09:48:40
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version 1.18, 2018/05/29 07:18:35
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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 ZSTEGR + dependencies |
*> Download ZSTEGR + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zstegr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zstegr.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zstegr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zstegr.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zstegr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zstegr.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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* SUBROUTINE ZSTEGR( JOBZ, RANGE, N, D, E, VL, VU, IL, IU, |
* SUBROUTINE ZSTEGR( JOBZ, RANGE, N, D, E, VL, VU, IL, IU, |
* ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
* ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
* LIWORK, INFO ) |
* LIWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER JOBZ, RANGE |
* CHARACTER JOBZ, RANGE |
* INTEGER IL, INFO, IU, LDZ, LIWORK, LWORK, M, N |
* INTEGER IL, INFO, IU, LDZ, LIWORK, LWORK, M, N |
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* DOUBLE PRECISION D( * ), E( * ), W( * ), WORK( * ) |
* DOUBLE PRECISION D( * ), E( * ), W( * ), WORK( * ) |
* COMPLEX*16 Z( LDZ, * ) |
* COMPLEX*16 Z( LDZ, * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> either an interval (VL,VU] or a range of indices IL:IU for the desired |
*> either an interval (VL,VU] or a range of indices IL:IU for the desired |
*> eigenvalues. |
*> eigenvalues. |
*> |
*> |
*> ZSTEGR is a compatability wrapper around the improved ZSTEMR routine. |
*> ZSTEGR is a compatibility wrapper around the improved ZSTEMR routine. |
*> See DSTEMR for further details. |
*> See DSTEMR for further details. |
*> |
*> |
*> One important change is that the ABSTOL parameter no longer provides any |
*> One important change is that the ABSTOL parameter no longer provides any |
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*> \param[in] VL |
*> \param[in] VL |
*> \verbatim |
*> \verbatim |
*> VL is DOUBLE PRECISION |
*> VL is DOUBLE PRECISION |
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*> |
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*> If RANGE='V', the lower bound of the interval to |
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*> be searched for eigenvalues. VL < VU. |
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*> Not referenced if RANGE = 'A' or 'I'. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] VU |
*> \param[in] VU |
*> \verbatim |
*> \verbatim |
*> VU is DOUBLE PRECISION |
*> VU is DOUBLE PRECISION |
*> |
*> |
*> If RANGE='V', the lower and upper bounds of the interval to |
*> If RANGE='V', the upper bound of the interval to |
*> be searched for eigenvalues. VL < VU. |
*> be searched for eigenvalues. VL < VU. |
*> Not referenced if RANGE = 'A' or 'I'. |
*> Not referenced if RANGE = 'A' or 'I'. |
*> \endverbatim |
*> \endverbatim |
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*> \param[in] IL |
*> \param[in] IL |
*> \verbatim |
*> \verbatim |
*> IL is INTEGER |
*> IL is INTEGER |
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*> |
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*> If RANGE='I', the index of the |
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*> smallest eigenvalue to be returned. |
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*> 1 <= IL <= IU <= N, if N > 0. |
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*> Not referenced if RANGE = 'A' or 'V'. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] IU |
*> \param[in] IU |
*> \verbatim |
*> \verbatim |
*> IU is INTEGER |
*> IU is INTEGER |
*> |
*> |
*> If RANGE='I', the indices (in ascending order) of the |
*> If RANGE='I', the index of the |
*> smallest and largest eigenvalues to be returned. |
*> largest eigenvalue to be returned. |
*> 1 <= IL <= IU <= N, if N > 0. |
*> 1 <= IL <= IU <= N, if N > 0. |
*> Not referenced if RANGE = 'A' or 'V'. |
*> Not referenced if RANGE = 'A' or 'V'. |
*> \endverbatim |
*> \endverbatim |
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*> |
*> |
*> \param[out] ISUPPZ |
*> \param[out] ISUPPZ |
*> \verbatim |
*> \verbatim |
*> ISUPPZ is INTEGER ARRAY, dimension ( 2*max(1,M) ) |
*> ISUPPZ is INTEGER array, dimension ( 2*max(1,M) ) |
*> The support of the eigenvectors in Z, i.e., the indices |
*> The support of the eigenvectors in Z, i.e., the indices |
*> indicating the nonzero elements in Z. The i-th computed eigenvector |
*> indicating the nonzero elements in Z. The i-th computed eigenvector |
*> is nonzero only in elements ISUPPZ( 2*i-1 ) through |
*> is nonzero only in elements ISUPPZ( 2*i-1 ) through |
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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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$ ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
$ ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, |
$ LIWORK, INFO ) |
$ LIWORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational 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..-- |
* November 2011 |
* June 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER JOBZ, RANGE |
CHARACTER JOBZ, RANGE |