dlarrc man page on Scientific

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```DLARRC(1)	    LAPACK auxiliary routine (version 3.2)	     DLARRC(1)

NAME
DLARRC  - the number of eigenvalues of the symmetric tridiagonal matrix
T that are in the interval (VL,VU] if JOBT = 'T', and of	 L  D  L^T  if
JOBT = 'L'

SYNOPSIS
SUBROUTINE DLARRC( JOBT,	 N,  VL, VU, D, E, PIVMIN, EIGCNT, LCNT, RCNT,
INFO )

CHARACTER	  JOBT

INTEGER	  EIGCNT, INFO, LCNT, N, RCNT

DOUBLE	  PRECISION PIVMIN, VL, VU

DOUBLE	  PRECISION D( * ), E( * )

PURPOSE
Find the number of eigenvalues of the symmetric	tridiagonal  matrix  T
that  are in the interval (VL,VU] if JOBT = 'T', and of L D L^T if JOBT
= 'L'.

ARGUMENTS
JOBT    (input) CHARACTER*1
= 'T':  Compute Sturm count for matrix T.
= 'L':  Compute Sturm count for matrix L D L^T.

N       (input) INTEGER
The order of the matrix. N > 0.

VL      (input) DOUBLE PRECISION
VU      (input) DOUBLE PRECISION The lower and upper bounds for
the eigenvalues.

D       (input) DOUBLE PRECISION array, dimension (N)
JOBT  =	'T': The N diagonal elements of the tridiagonal matrix
T.
JOBT = 'L': The N diagonal elements of the diagonal matrix D.

E       (input) DOUBLE PRECISION array, dimension (N)
JOBT = 'T': The N-1 offdiagonal elements of the matrix T.
JOBT = 'L': The N-1 offdiagonal elements of the matrix L.

PIVMIN  (input) DOUBLE PRECISION
The minimum pivot in the Sturm sequence for T.

EIGCNT  (output) INTEGER
The number of eigenvalues of the symmetric tridiagonal matrix T
that are in the interval (VL,VU]

LCNT    (output) INTEGER
RCNT	(output)  INTEGER  The left and right negcounts of the
interval.

INFO    (output) INTEGER

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

LAPACK auxiliary routine (versioNovember 2008			     DLARRC(1)
```
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