TESTING/LIN/cget02.f(3)    Library Functions Manual    TESTING/LIN/cget02.f(3)

NAME
       TESTING/LIN/cget02.f

SYNOPSIS
   Functions/Subroutines
       subroutine cget02 (trans, m, n, nrhs, a, lda, x, ldx, b, ldb, rwork,
           resid)
           CGET02

Function/Subroutine Documentation
   subroutine cget02 (character trans, integer m, integer n, integer nrhs,
       complex, dimension( lda, * ) a, integer lda, complex, dimension( ldx, *
       ) x, integer ldx, complex, dimension( ldb, * ) b, integer ldb, real,
       dimension( * ) rwork, real resid)
       CGET02

       Purpose:


           !>
           !> CGET02 computes the residual for a solution of a system of linear
           !> equations op(A)*X = B:
           !>    RESID = norm(B - op(A)*X) / ( norm(op(A)) * norm(X) * EPS ),
           !> where op(A) = A, A**T, or A**H, depending on TRANS, and EPS is the
           !> machine epsilon.
           !>

       Parameters
           TRANS

           !>          TRANS is CHARACTER*1
           !>          Specifies the form of the system of equations:
           !>          = 'N':  A    * X = B  (No transpose)
           !>          = 'T':  A**T * X = B  (Transpose)
           !>          = 'C':  A**H * X = B  (Conjugate transpose)
           !>

           M

           !>          M is INTEGER
           !>          The number of rows of the matrix A.  M >= 0.
           !>

           N

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

           NRHS

           !>          NRHS is INTEGER
           !>          The number of columns of B, the matrix of right hand sides.
           !>          NRHS >= 0.
           !>

           A

           !>          A is COMPLEX array, dimension (LDA,N)
           !>          The original M x N matrix A.
           !>

           LDA

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

           X

           !>          X is COMPLEX array, dimension (LDX,NRHS)
           !>          The computed solution vectors for the system of linear
           !>          equations.
           !>

           LDX

           !>          LDX is INTEGER
           !>          The leading dimension of the array X.  If TRANS = 'N',
           !>          LDX >= max(1,N); if TRANS = 'T' or 'C', LDX >= max(1,M).
           !>

           B

           !>          B is COMPLEX array, dimension (LDB,NRHS)
           !>          On entry, the right hand side vectors for the system of
           !>          linear equations.
           !>          On exit, B is overwritten with the difference B - op(A)*X.
           !>

           LDB

           !>          LDB is INTEGER
           !>          The leading dimension of the array B.  IF TRANS = 'N',
           !>          LDB >= max(1,M); if TRANS = 'T' or 'C', LDB >= max(1,N).
           !>

           RWORK

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

           RESID

           !>          RESID is REAL
           !>          The maximum over the number of right hand sides of
           !>          norm(B - op(A)*X) / ( norm(op(A)) * norm(X) * EPS ).
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 132 of file cget02.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/cget02.f(3)