---
name: "zerred.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/zerred.f"
---

# zerred.f(3)

## NAME

TESTING/EIG/zerred.f

## SYNOPSIS

### Functions/Subroutines

subroutine **zerred** (path, nunit)\
 **ZERRED**

## Function/Subroutine Documentation

### subroutine zerred (character\*3 path, integer nunit)

**ZERRED**

**Purpose:**

```
!>
!> ZERRED tests the error exits for the eigenvalue driver routines for
!> DOUBLE COMPLEX PRECISION matrices:
!>
!> PATH  driver   description
!> ----  ------   -----------
!> ZEV   ZGEEV    find eigenvalues/eigenvectors for nonsymmetric A
!> ZES   ZGEES    find eigenvalues/Schur form for nonsymmetric A
!> ZVX   ZGEEVX   ZGEEV + balancing and condition estimation
!> ZSX   ZGEESX   ZGEES + balancing and condition estimation
!> ZBD   ZGESVD   compute SVD of an M-by-N matrix A
!>       ZGESDD   compute SVD of an M-by-N matrix A(by divide and
!>                conquer)
!>       ZGEJSV   compute SVD of an M-by-N matrix A where M >= N
!>       ZGESVDX  compute SVD of an M-by-N matrix A(by bisection
!>                and inverse iteration)
!>       ZGESVDQ  compute SVD of an M-by-N matrix A(with a
!>                QR-Preconditioned )
!>
```

**Parameters**

*PATH*

```
!>          PATH is CHARACTER*3
!>          The LAPACK path name for the routines to be tested.
!>
```

*NUNIT*

```
!>          NUNIT is INTEGER
!>          The unit number for output.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **69** of file **zerred.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.