!>
!> 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'.
!> 

JOBT

!>          JOBT is CHARACTER*1
!>          = 'T':  Compute Sturm count for matrix T.
!>          = 'L':  Compute Sturm count for matrix L D L^T.
!> 

N

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

VL

!>          VL is REAL
!>          The lower bound for the eigenvalues.
!> 

VU

!>          VU is REAL
!>          The upper bound for the eigenvalues.
!> 

D

!>          D is REAL 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

!>          E is REAL 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

!>          PIVMIN is REAL
!>          The minimum pivot in the Sturm sequence for T.
!> 

EIGCNT

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

LCNT

!>          LCNT is INTEGER
!> 

RCNT

!>          RCNT is INTEGER
!>          The left and right negcounts of the interval.
!> 

INFO

!>          INFO is INTEGER
!> 

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

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