TESTING/LIN/zpot01.f(3)    Library Functions Manual    TESTING/LIN/zpot01.f(3)

NAME
       TESTING/LIN/zpot01.f

SYNOPSIS
   Functions/Subroutines
       subroutine zpot01 (uplo, n, a, lda, afac, ldafac, rwork, resid)
           ZPOT01

Function/Subroutine Documentation
   subroutine zpot01 (character uplo, integer n, complex*16, dimension( lda, *
       ) a, integer lda, complex*16, dimension( ldafac, * ) afac, integer
       ldafac, double precision, dimension( * ) rwork, double precision resid)
       ZPOT01

       Purpose:


           !>
           !> ZPOT01 reconstructs a Hermitian positive definite matrix  A  from
           !> its L*L' or U'*U factorization and computes the residual
           !>    norm( L*L' - A ) / ( N * norm(A) * EPS ) or
           !>    norm( U'*U - A ) / ( N * norm(A) * EPS ),
           !> where 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*16 array, dimension (LDA,N)
           !>          The original Hermitian matrix A.
           !>

           LDA

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

           AFAC

           !>          AFAC is COMPLEX*16 array, dimension (LDAFAC,N)
           !>          On entry, the factor L or U from the L * L**H or U**H * U
           !>          factorization of A.
           !>          Overwritten with the reconstructed matrix, and then with
           !>          the difference L * L**H - A (or U**H * U - A).
           !>

           LDAFAC

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

           RWORK

           !>          RWORK is DOUBLE PRECISION array, dimension (N)
           !>

           RESID

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

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 105 of file zpot01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/zpot01.f(3)