---
name: "zlctes.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/zlctes.f"
---

# zlctes.f(3)

## NAME

TESTING/EIG/zlctes.f

## SYNOPSIS

### Functions/Subroutines

logical function **zlctes** (z, d)\
 **ZLCTES**

## Function/Subroutine Documentation

### logical function zlctes (complex\*16 z, complex\*16 d)

**ZLCTES**

**Purpose:**

```
!>
!> ZLCTES returns .TRUE. if the eigenvalue Z/D is to be selected
!> (specifically, in this subroutine, if the real part of the
!> eigenvalue is negative), and otherwise it returns .FALSE..
!>
!> It is used by the test routine ZDRGES to test whether the driver
!> routine ZGGES successfully sorts eigenvalues.
!>
```

**Parameters**

*Z*

```
!>          Z is COMPLEX*16
!>          The numerator part of a complex eigenvalue Z/D.
!>
```

*D*

```
!>          D is COMPLEX*16
!>          The denominator part of a complex eigenvalue Z/D.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **57** of file **zlctes.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.