SRC/slarrr.f(3)            Library Functions Manual            SRC/slarrr.f(3)

NAME
       SRC/slarrr.f

SYNOPSIS
   Functions/Subroutines
       subroutine slarrr (n, d, e, info)
           SLARRR 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 slarrr (integer n, real, dimension( * ) d, real, dimension( * )
       e, integer info)
       SLARRR 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 REAL array, dimension (N)
           !>          The N diagonal elements of the tridiagonal matrix T.
           !>

           E

           !>          E is REAL 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.

       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 93 of file slarrr.f.

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

LAPACK                          Version 3.12.0                 SRC/slarrr.f(3)