TESTING/LIN/zget03.f(3) Library Functions Manual TESTING/LIN/zget03.f(3)

TESTING/LIN/zget03.f


subroutine zget03 (n, a, lda, ainv, ldainv, work, ldwork, rwork, rcond, resid)
ZGET03

ZGET03

Purpose:

!>
!> ZGET03 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 COMPLEX*16 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 COMPLEX*16 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 COMPLEX*16 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 108 of file zget03.f.

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Version 3.12.0 LAPACK