zla_herpvgrw.f(3) LAPACK zla_herpvgrw.f(3)NAMEzla_herpvgrw.f-
SYNOPSIS
Functions/Subroutines
DOUBLE PRECISION function zla_herpvgrw (UPLO, N, INFO, A, LDA, AF,
LDAF, IPIV, WORK)
ZLA_HERPVGRW
Function/Subroutine Documentation
DOUBLE PRECISION function zla_herpvgrw (character*1UPLO, integerN,
integerINFO, complex*16, dimension( lda, * )A, integerLDA, complex*16,
dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV,
double precision, dimension( * )WORK)
ZLA_HERPVGRW
Purpose:
ZLA_HERPVGRW 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.
Parameters:
UPLO
UPLO is CHARACTER*1
= 'U': Upper triangle of A is stored;
= 'L': Lower triangle of A is stored.
N
N is INTEGER
The number of linear equations, i.e., the order of the
matrix A. N >= 0.
INFO
INFO is INTEGER
The value of INFO returned from ZHETRF, .i.e., the pivot in
column INFO is exactly 0.
A
A is COMPLEX*16 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 COMPLEX*16 array, dimension (LDAF,N)
The block diagonal matrix D and the multipliers used to
obtain the factor U or L as computed by ZHETRF.
LDAF
LDAF is INTEGER
The leading dimension of the array AF. LDAF >= max(1,N).
IPIV
IPIV is INTEGER array, dimension (N)
Details of the interchanges and the block structure of D
as determined by ZHETRF.
WORK
WORK is COMPLEX*16 array, dimension (2*N)
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 123 of file zla_herpvgrw.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 zla_herpvgrw.f(3)
