
NAMEzla_gerpvgrw.f SYNOPSISFunctions/SubroutinesDOUBLE PRECISION function zla_gerpvgrw (N, NCOLS, A, LDA, AF, LDAF) Function/Subroutine DocumentationDOUBLE 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
Author:
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 NbyN 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 2012
Definition at line 100 of file zla_gerpvgrw.f.
AuthorGenerated automatically by Doxygen for LAPACK from the source code.
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