version 1.18, 2016/08/27 15:34:30
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version 1.24, 2023/08/07 08:38:57
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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 DLARRE + dependencies |
*> Download DLARRE + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarre.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarre.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarre.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarre.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarre.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarre.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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* RTOL1, RTOL2, SPLTOL, NSPLIT, ISPLIT, M, |
* RTOL1, RTOL2, SPLTOL, NSPLIT, ISPLIT, M, |
* W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN, |
* W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN, |
* WORK, IWORK, INFO ) |
* WORK, IWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER RANGE |
* CHARACTER RANGE |
* INTEGER IL, INFO, IU, M, N, NSPLIT |
* INTEGER IL, INFO, IU, M, N, NSPLIT |
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* DOUBLE PRECISION D( * ), E( * ), E2( * ), GERS( * ), |
* DOUBLE PRECISION D( * ), E( * ), E2( * ), GERS( * ), |
* $ W( * ),WERR( * ), WGAP( * ), WORK( * ) |
* $ W( * ),WERR( * ), WGAP( * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> RTOL2 is DOUBLE PRECISION |
*> RTOL2 is DOUBLE PRECISION |
*> Parameters for bisection. |
*> Parameters for bisection. |
*> An interval [LEFT,RIGHT] has converged if |
*> An interval [LEFT,RIGHT] has converged if |
*> RIGHT-LEFT.LT.MAX( RTOL1*GAP, RTOL2*MAX(|LEFT|,|RIGHT|) ) |
*> RIGHT-LEFT < MAX( RTOL1*GAP, RTOL2*MAX(|LEFT|,|RIGHT|) ) |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in] SPLTOL |
*> \param[in] SPLTOL |
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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 June 2016 |
*> \ingroup OTHERauxiliary |
* |
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*> \ingroup auxOTHERauxiliary |
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* |
* |
*> \par Further Details: |
*> \par Further Details: |
* ===================== |
* ===================== |
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$ W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN, |
$ W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN, |
$ WORK, IWORK, INFO ) |
$ WORK, IWORK, INFO ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.6.1) -- |
* -- LAPACK auxiliary 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..-- |
* June 2016 |
|
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER RANGE |
CHARACTER RANGE |
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* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DCOPY, DLARNV, DLARRA, DLARRB, DLARRC, DLARRD, |
EXTERNAL DCOPY, DLARNV, DLARRA, DLARRB, DLARRC, DLARRD, |
$ DLASQ2 |
$ DLASQ2, DLARRK |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC ABS, MAX, MIN |
INTRINSIC ABS, MAX, MIN |
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* |
* |
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INFO = 0 |
INFO = 0 |
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* |
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* Quick return if possible |
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* |
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IF( N.LE.0 ) THEN |
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RETURN |
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END IF |
* |
* |
* Decode RANGE |
* Decode RANGE |
* |
* |
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RETURN |
RETURN |
* |
* |
* end of DLARRE |
* End of DLARRE |
* |
* |
END |
END |