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dlarrr.f(3)                         LAPACK                         dlarrr.f(3)

NAME
       dlarrr.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dlarrr (N, D, E, INFO)
           DLARRR performs tests to decide whether the symmetric tridiagonal
           matrix T warrants expensive computations which guarantee high
           relative accuracy in the eigenvalues.

Function/Subroutine Documentation
   subroutine dlarrr (integerN, double precision, dimension( * )D, double
       precision, dimension( * )E, integerINFO)
       DLARRR performs tests to decide whether the symmetric tridiagonal
       matrix T warrants expensive computations which guarantee high relative
       accuracy in the eigenvalues.

       Purpose:

            Perform tests to decide whether the symmetric tridiagonal matrix T
            warrants expensive computations which guarantee high relative accuracy
            in the eigenvalues.

       Parameters:
           N

                     N is INTEGER
                     The order of the matrix. N > 0.

           D

                     D is DOUBLE PRECISION array, dimension (N)
                     The N diagonal elements of the tridiagonal matrix T.

           E

                     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.

           INFO

                     INFO is INTEGER
                     INFO = 0(default) : the matrix warrants computations preserving
                                         relative accuracy.
                     INFO = 1          : the matrix warrants computations guaranteeing
                                         only absolute accuracy.

       Author:
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Date:
           September 2012

       Contributors:
           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

       Definition at line 95 of file dlarrr.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2                   Sat Nov 16 2013                    dlarrr.f(3)