TESTING/LIN/zptt01.f(3)    Library Functions Manual    TESTING/LIN/zptt01.f(3)

NAME
       TESTING/LIN/zptt01.f

SYNOPSIS
   Functions/Subroutines
       subroutine zptt01 (n, d, e, df, ef, work, resid)
           ZPTT01

Function/Subroutine Documentation
   subroutine zptt01 (integer n, double precision, dimension( * ) d,
       complex*16, dimension( * ) e, double precision, dimension( * ) df,
       complex*16, dimension( * ) ef, complex*16, dimension( * ) work, double
       precision resid)
       ZPTT01

       Purpose:


           !>
           !> ZPTT01 reconstructs a tridiagonal matrix A from its L*D*L'
           !> factorization and computes the residual
           !>    norm(L*D*L' - A) / ( n * norm(A) * EPS ),
           !> where EPS is the machine epsilon.
           !>

       Parameters
           N

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

           D

           !>          D is DOUBLE PRECISION array, dimension (N)
           !>          The n diagonal elements of the tridiagonal matrix A.
           !>

           E

           !>          E is COMPLEX*16 array, dimension (N-1)
           !>          The (n-1) subdiagonal elements of the tridiagonal matrix A.
           !>

           DF

           !>          DF is DOUBLE PRECISION array, dimension (N)
           !>          The n diagonal elements of the factor L from the L*D*L'
           !>          factorization of A.
           !>

           EF

           !>          EF is COMPLEX*16 array, dimension (N-1)
           !>          The (n-1) subdiagonal elements of the factor L from the
           !>          L*D*L' factorization of A.
           !>

           WORK

           !>          WORK is COMPLEX*16 array, dimension (2*N)
           !>

           RESID

           !>          RESID is DOUBLE PRECISION
           !>          norm(L*D*L' - A) / (n * norm(A) * EPS)
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 91 of file zptt01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/zptt01.f(3)