# zget01.f - Man Page

TESTING/LIN/zget01.f

## Synopsis

### Functions/Subroutines

subroutine zget01 (m, n, a, lda, afac, ldafac, ipiv, rwork, resid)
ZGET01

## Function/Subroutine Documentation

### subroutine zget01 (integer m, integer n, complex*16, dimension( lda, * ) a, integer lda, complex*16, dimension( ldafac, * ) afac, integer ldafac, integer, dimension( * ) ipiv, double precision, dimension( * ) rwork, double precision resid)

ZGET01

Purpose:

ZGET01 reconstructs a matrix A from its L*U factorization and
computes the residual
norm(L*U - A) / ( N * norm(A) * EPS ),
where EPS is the machine epsilon.
Parameters

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.

A

A is COMPLEX*16 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).

AFAC

AFAC is COMPLEX*16 array, dimension (LDAFAC,N)
The factored form of the matrix A.  AFAC contains the factors
L and U from the L*U factorization as computed by ZGETRF.
Overwritten with the reconstructed matrix, and then with the
difference L*U - A.

LDAFAC

LDAFAC is INTEGER
The leading dimension of the array AFAC.  LDAFAC >= max(1,M).

IPIV

IPIV is INTEGER array, dimension (N)
The pivot indices from ZGETRF.

RWORK

RWORK is DOUBLE PRECISION array, dimension (M)

RESID

RESID is DOUBLE PRECISION
norm(L*U - A) / ( N * norm(A) * EPS )
Author

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Definition at line 106 of file zget01.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page zget01(3) is an alias of zget01.f(3).

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK