# dget03.f - Man Page

TESTING/LIN/dget03.f

## Synopsis

### Functions/Subroutines

subroutine dget03 (n, a, lda, ainv, ldainv, work, ldwork, rwork, rcond, resid)
DGET03

## Function/Subroutine Documentation

### subroutine dget03 (integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( ldainv, * ) ainv, integer ldainv, double precision, dimension( ldwork, * ) work, integer ldwork, double precision, dimension( * ) rwork, double precision rcond, double precision resid)

DGET03

Purpose:

DGET03 computes the residual for a general matrix times its inverse:
norm( I - AINV*A ) / ( N * norm(A) * norm(AINV) * EPS ),
where EPS is the machine epsilon.
Parameters

N

N is INTEGER
The number of rows and columns of the matrix A.  N >= 0.

A

A is DOUBLE PRECISION array, dimension (LDA,N)
The original N x N matrix A.

LDA

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

AINV

AINV is DOUBLE PRECISION array, dimension (LDAINV,N)
The inverse of the matrix A.

LDAINV

LDAINV is INTEGER
The leading dimension of the array AINV.  LDAINV >= max(1,N).

WORK

WORK is DOUBLE PRECISION array, dimension (LDWORK,N)

LDWORK

LDWORK is INTEGER
The leading dimension of the array WORK.  LDWORK >= max(1,N).

RWORK

RWORK is DOUBLE PRECISION array, dimension (N)

RCOND

RCOND is DOUBLE PRECISION
The reciprocal of the condition number of A, computed as
( 1/norm(A) ) / norm(AINV).

RESID

RESID is DOUBLE PRECISION
norm(I - AINV*A) / ( N * norm(A) * norm(AINV) * EPS )
Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 107 of file dget03.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dget03(3) is an alias of dget03.f(3).

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