DOUBLE PRECISION function zla_gerpvgrw (N, NCOLS, A, LDA, AF, LDAF)
DOUBLE PRECISION function zla_gerpvgrw (integerN, integerNCOLS, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( ldaf, * )AF, integerLDAF)ZLA_GERPVGRW multiplies a square real matrix by a complex matrix. Purpose:
ZLA_GERPVGRW 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.
N is INTEGER The number of linear equations, i.e., the order of the matrix A. N >= 0.NCOLS
NCOLS is INTEGER The number of columns of the matrix A. NCOLS >= 0.A
A is DOUBLE PRECISION array, dimension (LDA,N) On entry, the N-by-N matrix A.LDA
LDA is INTEGER The leading dimension of the array A. LDA >= max(1,N).AF
AF is DOUBLE PRECISION array, dimension (LDAF,N) The factors L and U from the factorization A = P*L*U as computed by ZGETRF.LDAF
LDAF is INTEGER The leading dimension of the array AF. LDAF >= max(1,N).
Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd.Date:
September 2012Definition at line 100 of file zla_gerpvgrw.f.