Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3 - computes the reciprocal pivot growth factor norm(A)/norm(U)

SYNOPSIS

       DOUBLE PRECISION FUNCTION ZLA_RPVGRW( N, NCOLS, A, LDA, AF, LDAF )

           IMPLICIT     NONE

           INTEGER      N, NCOLS, LDA, LDAF

           COMPLEX*16   A( LDA, * ), AF( LDAF, * )

PURPOSE

       ZLA_RPVGRW  computes the reciprocal pivot growth factor norm(A)/norm(U). The "max absolute
       element" norm is used. If this is
        much less than 1, the stability of the LU factorization of the
        (equilibrated) matrix A could be poor. This also means that the
        solution X, estimated condition numbers, and error bounds could be
        unreliable.

ARGUMENTS

        N       (input) INTEGER
                The number of linear equations, i.e., the order of the
                matrix A.  N >= 0.

        NCOLS   (input) INTEGER
                The number of columns of the matrix A. NCOLS >= 0.

        A       (input) DOUBLE PRECISION array, dimension (LDA,N)
                On entry, the N-by-N matrix A.

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

        AF      (input) DOUBLE PRECISION array, dimension (LDAF,N)
                The factors L and U from the factorization
                A = P*L*U as computed by ZGETRF.

        LDAF    (input) INTEGER
                The leading dimension of the array AF.  LDAF >= max(1,N).

    LAPACK routine (version 3.2.2)          April 2011                        ZLA_RPVGRW(3lapack)