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version 1.7, 2010/12/21 13:53:32 version 1.8, 2011/11/21 20:42:58
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   *> \brief \b DLARRR
   *
   *  =========== DOCUMENTATION ===========
   *
   * Online html documentation available at 
   *            http://www.netlib.org/lapack/explore-html/ 
   *
   *> \htmlonly
   *> Download DLARRR + dependencies 
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarrr.f"> 
   *> [TGZ]</a> 
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarrr.f"> 
   *> [ZIP]</a> 
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarrr.f"> 
   *> [TXT]</a>
   *> \endhtmlonly 
   *
   *  Definition:
   *  ===========
   *
   *       SUBROUTINE DLARRR( N, D, E, INFO )
   * 
   *       .. Scalar Arguments ..
   *       INTEGER            N, INFO
   *       ..
   *       .. Array Arguments ..
   *       DOUBLE PRECISION   D( * ), E( * )
   *       ..
   *  
   *  
   *
   *> \par Purpose:
   *  =============
   *>
   *> \verbatim
   *>
   *> Perform tests to decide whether the symmetric tridiagonal matrix T
   *> warrants expensive computations which guarantee high relative accuracy
   *> in the eigenvalues.
   *> \endverbatim
   *
   *  Arguments:
   *  ==========
   *
   *> \param[in] N
   *> \verbatim
   *>          N is INTEGER
   *>          The order of the matrix. N > 0.
   *> \endverbatim
   *>
   *> \param[in] D
   *> \verbatim
   *>          D is DOUBLE PRECISION array, dimension (N)
   *>          The N diagonal elements of the tridiagonal matrix T.
   *> \endverbatim
   *>
   *> \param[in,out] E
   *> \verbatim
   *>          E is DOUBLE PRECISION array, dimension (N)
   *>          On entry, the first (N-1) entries contain the subdiagonal
   *>          elements of the tridiagonal matrix T; E(N) is set to ZERO.
   *> \endverbatim
   *>
   *> \param[out] INFO
   *> \verbatim
   *>          INFO is INTEGER
   *>          INFO = 0(default) : the matrix warrants computations preserving
   *>                              relative accuracy.
   *>          INFO = 1          : the matrix warrants computations guaranteeing
   *>                              only absolute accuracy.
   *> \endverbatim
   *
   *  Authors:
   *  ========
   *
   *> \author Univ. of Tennessee 
   *> \author Univ. of California Berkeley 
   *> \author Univ. of Colorado Denver 
   *> \author NAG Ltd. 
   *
   *> \date November 2011
   *
   *> \ingroup auxOTHERauxiliary
   *
   *> \par Contributors:
   *  ==================
   *>
   *> Beresford Parlett, University of California, Berkeley, USA \n
   *> Jim Demmel, University of California, Berkeley, USA \n
   *> Inderjit Dhillon, University of Texas, Austin, USA \n
   *> Osni Marques, LBNL/NERSC, USA \n
   *> Christof Voemel, University of California, Berkeley, USA
   *
   *  =====================================================================
       SUBROUTINE DLARRR( N, D, E, INFO )        SUBROUTINE DLARRR( N, D, E, INFO )
 *  *
 *  -- LAPACK auxiliary routine (version 3.2) --  *  -- LAPACK auxiliary routine (version 3.4.0) --
 *  -- 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 2006  *     November 2011
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       INTEGER            N, INFO        INTEGER            N, INFO
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 *     ..  *     ..
 *  *
 *  *
 *  Purpose  
 *  =======  
 *  
 *  Perform tests to decide whether the symmetric tridiagonal matrix T  
 *  warrants expensive computations which guarantee high relative accuracy  
 *  in the eigenvalues.  
 *  
 *  Arguments  
 *  =========  
 *  
 *  N       (input) INTEGER  
 *          The order of the matrix. N > 0.  
 *  
 *  D       (input) DOUBLE PRECISION array, dimension (N)  
 *          The N diagonal elements of the tridiagonal matrix T.  
 *  
 *  E       (input/output) DOUBLE PRECISION array, dimension (N)  
 *          On entry, the first (N-1) entries contain the subdiagonal  
 *          elements of the tridiagonal matrix T; E(N) is set to ZERO.  
 *  
 *  INFO    (output) INTEGER  
 *          INFO = 0(default) : the matrix warrants computations preserving  
 *                              relative accuracy.  
 *          INFO = 1          : the matrix warrants computations guaranteeing  
 *                              only absolute accuracy.  
 *  
 *  Further Details  
 *  ===============  
 *  
 *  Based on contributions by  
 *     Beresford Parlett, University of California, Berkeley, USA  
 *     Jim Demmel, University of California, Berkeley, USA  
 *     Inderjit Dhillon, University of Texas, Austin, USA  
 *     Osni Marques, LBNL/NERSC, USA  
 *     Christof Voemel, University of California, Berkeley, USA  
 *  
 *  =====================================================================  *  =====================================================================
 *  *
 *     .. Parameters ..  *     .. Parameters ..
Removed from v.1.7  
changed lines
  Added in v.1.8

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