---
name: "dget03.f"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/dget03.f"
---

# dget03.f(3)

## NAME

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.