TESTING/LIN/chpt01.f(3)    Library Functions Manual    TESTING/LIN/chpt01.f(3)

NAME
       TESTING/LIN/chpt01.f

SYNOPSIS
   Functions/Subroutines
       subroutine chpt01 (uplo, n, a, afac, ipiv, c, ldc, rwork, resid)
           CHPT01

Function/Subroutine Documentation
   subroutine chpt01 (character uplo, integer n, complex, dimension( * ) a,
       complex, dimension( * ) afac, integer, dimension( * ) ipiv, complex,
       dimension( ldc, * ) c, integer ldc, real, dimension( * ) rwork, real
       resid)
       CHPT01

       Purpose:


           !>
           !> CHPT01 reconstructs a Hermitian indefinite packed matrix A from its
           !> block L*D*L' or U*D*U' factorization and computes the residual
           !>    norm( C - A ) / ( N * norm(A) * EPS ),
           !> where C is the reconstructed matrix, EPS is the machine epsilon,
           !> L' is the conjugate transpose of L, and U' is the conjugate transpose
           !> of U.
           !>

       Parameters
           UPLO

           !>          UPLO is CHARACTER*1
           !>          Specifies whether the upper or lower triangular part of the
           !>          Hermitian matrix A is stored:
           !>          = 'U':  Upper triangular
           !>          = 'L':  Lower triangular
           !>

           N

           !>          N is INTEGER
           !>          The number of rows and columns of the matrix A.  N >= 0.
           !>

           A

           !>          A is COMPLEX array, dimension (N*(N+1)/2)
           !>          The original Hermitian matrix A, stored as a packed
           !>          triangular matrix.
           !>

           AFAC

           !>          AFAC is COMPLEX array, dimension (N*(N+1)/2)
           !>          The factored form of the matrix A, stored as a packed
           !>          triangular matrix.  AFAC contains the block diagonal matrix D
           !>          and the multipliers used to obtain the factor L or U from the
           !>          block L*D*L' or U*D*U' factorization as computed by CHPTRF.
           !>

           IPIV

           !>          IPIV is INTEGER array, dimension (N)
           !>          The pivot indices from CHPTRF.
           !>

           C

           !>          C is COMPLEX array, dimension (LDC,N)
           !>

           LDC

           !>          LDC is INTEGER
           !>          The leading dimension of the array C.  LDC >= max(1,N).
           !>

           RWORK

           !>          RWORK is REAL array, dimension (N)
           !>

           RESID

           !>          RESID is REAL
           !>          If UPLO = 'L', norm(L*D*L' - A) / ( N * norm(A) * EPS )
           !>          If UPLO = 'U', norm(U*D*U' - A) / ( N * norm(A) * EPS )
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 112 of file chpt01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/chpt01.f(3)