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							  Tue Sep 25 2012						       dlarrr.f(3)