TESTING/EIG/sstect.f(3)    Library Functions Manual    TESTING/EIG/sstect.f(3)

NAME
       TESTING/EIG/sstect.f

SYNOPSIS
   Functions/Subroutines
       subroutine sstect (n, a, b, shift, num)
           SSTECT

Function/Subroutine Documentation
   subroutine sstect (integer n, real, dimension( * ) a, real, dimension( * )
       b, real shift, integer num)
       SSTECT

       Purpose:


           !>
           !>    SSTECT counts the number NUM of eigenvalues of a tridiagonal
           !>    matrix T which are less than or equal to SHIFT. T has
           !>    diagonal entries A(1), ... , A(N), and offdiagonal entries
           !>    B(1), ..., B(N-1).
           !>    See W. Kahan , Report CS41, Computer Science Dept., Stanford
           !>    University, July 21, 1966
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The dimension of the tridiagonal matrix T.
           !>

           A

           !>          A is REAL array, dimension (N)
           !>          The diagonal entries of the tridiagonal matrix T.
           !>

           B

           !>          B is REAL array, dimension (N-1)
           !>          The offdiagonal entries of the tridiagonal matrix T.
           !>

           SHIFT

           !>          SHIFT is REAL
           !>          The shift, used as described under Purpose.
           !>

           NUM

           !>          NUM is INTEGER
           !>          The number of eigenvalues of T less than or equal
           !>          to SHIFT.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 81 of file sstect.f.

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

LAPACK                          Version 3.12.0         TESTING/EIG/sstect.f(3)